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 <title>Physical Review Letters Celebrates 50 Years</title>
 <link>http://prl.aps.org/50years</link>
 <description></description>
 <language>en</language>
<item>
 <title>Essay: The Future of Scientific Publishing</title>
 <link>http://prl.aps.org/edannounce/PhysRevLett.102.190001</link>
 <description>&lt;div style = &quot;float: left; padding: 0em 1em;&quot;&gt;&lt;img src =&quot;/files/aps_announcement/thumb_sandweiss.jpg&quot; alt = &quot;image&quot;/&gt;&lt;/div&gt;
How can the scientific publishing enterprise deal with the increasing specialization of individual physicists? The possible aids include virtual journals, the new APS journal &lt;span style=&quot;font-style: italic&quot;&gt;Physics&lt;/span&gt;, and the possibility of artificial intelligence programs.</description>
 <pubDate>Mon, 11 May 2009 04:00:00 +0000</pubDate>
 <guid isPermaLink="false">2666 at </guid>
</item>
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 <title>Essay: Computers in the APS Editorial Office: The Early Years</title>
 <link>http://prl.aps.org/edannounce/PhysRevLett.102.100001</link>
 <description>&lt;div style = &quot;float: left; padding: 0em 1em;&quot;&gt;&lt;img src =&quot;/files/aps_announcement/thumb_peter_formal.jpg&quot; alt = &quot;image&quot;/&gt;&lt;/div&gt;

Today, essentially all of the American Physical Society’s publishing operations are electronic. The publication of record for a paper is now its posting on the web, not its appearance in print on a journal page. All communications among editors, referees, and authors are electronic, usually via the web. It must be conceded though that there are still situations in which paper is definitely to be preferred.</description>
 <pubDate>Mon, 09 Mar 2009 04:00:00 +0000</pubDate>
 <guid isPermaLink="false">2506 at </guid>
</item>
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 <title>Editorial: Is PRL Too Large to Have an ‘‘Impact’’? </title>
 <link>http://prl.aps.org/edannounce/PhysRevLett.102.060001</link>
 <description>Impact factors are a bit like television’s Nielsen ratings. You scrutinize them and take credit if you are a beneficiary, but they are a tad unsavory! Physicists ostensibly do not &lt;span style=&quot;font-style: italic&quot;&gt;write&lt;/span&gt; to garner citations; they merely prefer to &lt;span style=&quot;font-style: italic&quot;&gt;publish&lt;/span&gt; in journals with high impact factors.</description>
 <pubDate>Mon, 09 Feb 2009 05:00:00 +0000</pubDate>
 <guid isPermaLink="false">2431 at </guid>
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<item>
 <title>Milestone Letters: Left-handed materials and perfect lenses</title>
 <link>http://prl.aps.org/50years/milestones/#2000</link>
 <description>&lt;p&gt;Composite Medium with Simultaneously Negative Permeability and Permittivity&lt;br/&gt;D. R. Smith, Willie J. Padilla, D. C. Vier, S. C. Nemat-Nasser, and S. Schultz&lt;br/&gt;Phys. Rev. Lett.  84, 4184 (2000)&lt;p&gt;Negative Refraction Makes a Perfect Lens&lt;br/&gt;J. B. Pendry&lt;br/&gt;Phys. Rev. Lett.  85, 3966 (2000)</description>
 <pubDate>Mon, 12 Jan 2009 05:00:00 +0000</pubDate>
 <guid isPermaLink="false">2360 at http://prl.aps.org</guid>
</item>
<item>
 <title>Milestone Letters: Optical frequency combs </title>
 <link>http://prl.aps.org/50years/milestones/#2000</link>
 <description>&lt;p&gt;&lt;span class = &quot;key&quot; style=&quot;font-size: 1.2em;&quot;&gt;Nobel Prize in Physics - 2005&lt;/span&gt;&lt;/p&gt;&lt;p&gt;Direct Link between Microwave and Optical Frequencies with a 300 THz Femtosecond Laser Comb&lt;br/&gt;Scott A. Diddams, David J. Jones, Jun Ye, Steven T. Cundiff, John L. Hall, Jinendra K. Ranka, Robert S. Windeler, Ronald Holzwarth, Thomas Udem, and T. W. Hänsch&lt;br/&gt;Phys. Rev. Lett.  84, 5102 (2000)&lt;p&gt;Phase Coherent Vacuum-Ultraviolet to Radio Frequency Comparison with a Mode-Locked Laser&lt;br/&gt;J. Reichert, M. Niering, R. Holzwarth, M. Weitz, Th. Udem, and T. W. Hänsch&lt;br/&gt;Phys. Rev. Lett.  84, 3232 (2000)</description>
 <pubDate>Mon, 12 Jan 2009 05:00:00 +0000</pubDate>
 <guid isPermaLink="false">2359 at http://prl.aps.org</guid>
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<item>
 <title>Milestone Letter: Large Mass Hierarchy from a Small Extra Dimension</title>
 <link>http://prl.aps.org/50years/milestones/#1999</link>
 <description>&lt;p&gt;Large Mass Hierarchy from a Small Extra Dimension&lt;br/&gt;Lisa Randall and Raman Sundrum&lt;br/&gt;Phys. Rev. Lett.  83, 3370 (1999)&lt;p&gt;An Alternative to Compactification&lt;br/&gt;Lisa Randall and Raman Sundrum&lt;br/&gt;Phys. Rev. Lett.  83, 4690 (1999)</description>
 <pubDate>Mon, 29 Dec 2008 05:00:00 +0000</pubDate>
 <guid isPermaLink="false">2301 at http://prl.aps.org</guid>
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<item>
 <title>Essay: American Physics, Policy, and Politics: An Uneasy Relationship</title>
 <link>http://prl.aps.org/edannounce/PhysRevLett.101.260001</link>
 <description>&lt;div style = &quot;float: left; padding: 0em 1em;&quot;&gt;&lt;img src =&quot;/files/aps_announcement/thumb_lane.png&quot; alt = &quot;image&quot;/&gt;&lt;/div&gt;

This essay deals with the unique influence that physics and physicists have had on U. S. federal policy since World War II. I identify some “lessons learned” from the last six decades and speculate about the future of U. S. physics and physicists as advisors to future presidents.
</description>
 <pubDate>Mon, 29 Dec 2008 05:00:00 +0000</pubDate>
 <guid isPermaLink="false">2304 at </guid>
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<item>
 <title>Milestone Letter: Evidence for Oscillation of Atmospheric Neutrinos</title>
 <link>http://prl.aps.org/50years/milestones/#1998</link>
 <description>&lt;p&gt;&lt;span class = &quot;key&quot; style=&quot;font-size: 1.2em;&quot;&gt;Nobel Prize in Physics - 2002&lt;/span&gt;&lt;/p&gt;&lt;p&gt;Evidence for Oscillation of Atmospheric Neutrinos&lt;br/&gt;Y. Fukuda &lt;i&gt;et al.&lt;/i&gt; (Super-Kamiokande Collaboration)&lt;br/&gt;Phys. Rev. Lett.  81, 1562 (1998)</description>
 <pubDate>Mon, 22 Dec 2008 05:00:00 +0000</pubDate>
 <guid isPermaLink="false">2293 at http://prl.aps.org</guid>
</item>
<item>
 <title>Essay: Fifty Years of Condensed Matter Physics</title>
 <link>http://prl.aps.org/edannounce/PhysRevLett.101.250001</link>
 <description>&lt;div style = &quot;float: left; padding: 0em 1em;&quot;&gt;&lt;img src =&quot;/files/aps_announcement/thumb_cohen.png&quot; alt = &quot;image&quot;/&gt;&lt;/div&gt;
Since the birth of &lt;i&gt;Physical Review Letters&lt;/i&gt; fifty years ago, condensed matter physics has seen considerable growth, and both the journal and the field have flourished during this period. In this essay, I begin with some general comments about condensed matter physics and then give some personal views on the conceptual development of the field and list some highlights. The focus is mostly on theoretical developments.

</description>
 <pubDate>Tue, 16 Dec 2008 05:00:00 +0000</pubDate>
 <guid isPermaLink="false">2291 at </guid>
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<item>
 <title>Milestone Letter: Nonequilibrium Equality for Free Energy Differences</title>
 <link>http://prl.aps.org/50years/milestones/#1997</link>
 <description>&lt;p&gt;Nonequilibrium Equality for Free Energy Differences&lt;br/&gt;C. Jarzynski&lt;br/&gt;Phys. Rev. Lett.  78, 2690 (1997)</description>
 <pubDate>Mon, 15 Dec 2008 05:00:00 +0000</pubDate>
 <guid isPermaLink="false">2292 at http://prl.aps.org</guid>
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<item>
 <title>Milestone Letter: Collective Excitations of a Bose-Einstein Condensate in a Dilute Gas</title>
 <link>http://prl.aps.org/50years/milestones/#1996</link>
 <description>&lt;p&gt;&lt;span class = &quot;key&quot; style=&quot;font-size: 1.2em;&quot;&gt;Nobel Prize in Physics - 2001&lt;/span&gt;&lt;/p&gt;&lt;p&gt;Collective Excitations of a Bose-Einstein Condensate in a Dilute Gas&lt;br/&gt;D. S. Jin, J. R. Ensher, M. R. Matthews, C. E. Wieman, and E. A. Cornell&lt;br/&gt;Phys. Rev. Lett.  77, 420 (1996)</description>
 <pubDate>Mon, 01 Dec 2008 05:00:00 +0000</pubDate>
 <guid isPermaLink="false">2254 at http://prl.aps.org</guid>
</item>
<item>
 <title>Milestone Letter: Bose-Einstein Condensation in a Gas of Sodium Atoms</title>
 <link>http://prl.aps.org/50years/milestones/#1995</link>
 <description>&lt;p&gt;&lt;span class = &quot;key&quot; style=&quot;font-size: 1.2em;&quot;&gt;Nobel Prize in Physics - 2001&lt;/span&gt;&lt;/p&gt;&lt;p&gt;Bose-Einstein Condensation in a Gas of Sodium Atoms&lt;br/&gt;K. B. Davis, M.-O. Mewes, M. R. Andrews, N. J. van Druten, D. S. Durfee, D. M. Kurn, and W. Ketterle&lt;br/&gt;Phys. Rev. Lett.  75, 3969 (1995)</description>
 <pubDate>Mon, 24 Nov 2008 05:00:00 +0000</pubDate>
 <guid isPermaLink="false">2225 at http://prl.aps.org</guid>
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<item>
 <title>Essay: The Origin of Physical Review Letters</title>
 <link>http://prl.aps.org/edannounce/PhysRevLett.101.210001</link>
 <description>&lt;div style = &quot;float: left; padding: 0em 1em;&quot;&gt;&lt;img src =&quot;/files/aps_announcement/thumb_trigg.png&quot; alt = &quot;image&quot;/&gt;&lt;/div&gt;
When Sam Goudsmit, then Editor of &lt;span style=&quot;font-style: italic&quot;&gt;Physical Review&lt;/span&gt;, decided to publish the Letters separately, he asked me to become Assistant Editor of the new journal. I wound up staying at PRL for a quarter of a century. I describe some of the new techniques we developed to speed up review and production so that Letters could be quickly published.</description>
 <pubDate>Fri, 21 Nov 2008 05:00:00 +0000</pubDate>
 <guid isPermaLink="false">2229 at </guid>
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<item>
 <title>Milestone Letters: Top Quark Discovery</title>
 <link>http://prl.aps.org/50years/milestones/#1994</link>
 <description>&lt;p&gt;Evidence for top quark production in &lt;span style=&quot;border-top: 1px solid black;&quot;&gt;&lt;i&gt;p&lt;/i&gt;&lt;/span&gt; &lt;i&gt;p&lt;/i&gt; collisions at √&lt;i&gt;s&lt;/i&gt; = 1.8 TeV&lt;br/&gt;F. Abe &lt;i&gt;et al.&lt;/i&gt; (CDF Collaboration)&lt;br/&gt;Phys. Rev. Lett.  73, 225 (1994)&lt;p&gt;Observation of Top Quark Production in &lt;span style=&quot;border-top: 1px solid black;&quot;&gt;&lt;i&gt;p&lt;/i&gt;&lt;/span&gt; &lt;i&gt;p&lt;/i&gt; Collisions with the Collider Detector at Fermilab&lt;br/&gt;F. Abe &lt;i&gt;et al.&lt;/i&gt; (CDF Collaboration)&lt;br/&gt;Phys. Rev. Lett.  74, 2626 (1995)&lt;p&gt;Observation of the Top Quark&lt;br/&gt;S. Abachi &lt;i&gt;et al.&lt;/i&gt; (D0 Collaboration)&lt;br/&gt;Phys. Rev. Lett.  74, 2632 (1995)</description>
 <pubDate>Mon, 10 Nov 2008 05:00:00 +0000</pubDate>
 <guid isPermaLink="false">2180 at http://prl.aps.org</guid>
</item>
<item>
 <title>Milestone Letter: Teleporting an unknown quantum state via dual classical and Einstein- Podolsky-Rosen channels</title>
 <link>http://prl.aps.org/50years/milestones/#1993</link>
 <description>&lt;p&gt;Teleporting an unknown quantum state via dual classical and Einstein-Podolsky-Rosen channels&lt;br/&gt;Charles H. Bennett, Gilles Brassard, Claude Crépeau, Richard Jozsa, Asher Peres, and William K. Wootters&lt;br/&gt;Phys. Rev. Lett.  70, 1895 (1993)</description>
 <pubDate>Mon, 03 Nov 2008 05:00:00 +0000</pubDate>
 <guid isPermaLink="false">2162 at http://prl.aps.org</guid>
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<item>
 <title>Milestone Letter: Density Matrix Formulation for Quantum Renormalization Groups</title>
 <link>http://prl.aps.org/50years/milestones/#1992</link>
 <description>&lt;p&gt;Density matrix formulation for quantum renormalization groups&lt;br/&gt;Steven R. White&lt;br/&gt;Phys. Rev. Lett.  69, 2863 (1992)</description>
 <pubDate>Mon, 27 Oct 2008 04:00:00 +0000</pubDate>
 <guid isPermaLink="false">2156 at http://prl.aps.org</guid>
</item>
<item>
 <title>Milestone Letters: Quantum Cryptography</title>
 <link>http://prl.aps.org/50years/milestones/#1991</link>
 <description>&lt;p&gt;Quantum cryptography based on Bell’s theorem&lt;br/&gt;Artur K. Ekert&lt;br/&gt;Phys. Rev. Lett.  67, 661 (1991)&lt;p&gt;Quantum cryptography without Bell’s theorem&lt;br/&gt;Charles H. Bennett, Gilles Brassard, and N. David Mermin&lt;br/&gt;Phys. Rev. Lett.  68, 557 (1992)</description>
 <pubDate>Mon, 20 Oct 2008 04:00:00 +0000</pubDate>
 <guid isPermaLink="false">2143 at http://prl.aps.org</guid>
</item>
<item>
 <title>Milestone Letter: 2008 Nobel Prize in Physics - Spontaneous Symmetry Breaking</title>
 <link>http://prl.aps.org/50years/milestones/#1960</link>
 <description>&lt;p&gt;&lt;span class = &quot;key&quot; style=&quot;font-size: 1.2em;&quot;&gt;Nobel Prize in Physics - 2008&lt;/span&gt;&lt;/p&gt;&lt;p&gt;Axial Vector Current Conservation in Weak Interactions&lt;br/&gt;Yoichiro Nambu&lt;br/&gt;Phys. Rev. Lett.  4, 380 (1960)</description>
 <pubDate>Mon, 13 Oct 2008 04:00:00 +0000</pubDate>
 <guid isPermaLink="false">2142 at http://prl.aps.org</guid>
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<item>
 <title>Milestone Letters: Chaos</title>
 <link>http://prl.aps.org/50years/milestones/#1990</link>
 <description>&lt;p&gt;Synchronization in chaotic systems&lt;br/&gt;Louis M. Pecora and Thomas L. Carroll&lt;br/&gt;Phys. Rev. Lett.  64, 821 (1990)&lt;p&gt;Controlling chaos&lt;br/&gt;Edward Ott, Celso Grebogi, and James A. Yorke&lt;br/&gt;Phys. Rev. Lett.  64, 1196 (1990)</description>
 <pubDate>Mon, 13 Oct 2008 04:00:00 +0000</pubDate>
 <guid isPermaLink="false">2140 at http://prl.aps.org</guid>
</item>
<item>
 <title>Essay: Fifty Years of Atomic, Molecular and Optical Physics in Physical Review Letters</title>
 <link>http://prl.aps.org/edannounce/PhysRevLett.101.160001</link>
 <description>&lt;div style = &quot;float: left; padding: 0em 1em;&quot;&gt;&lt;img src =&quot;/files/aps_announcement/thumb_haroche.png&quot; alt = &quot;image&quot;/&gt;&lt;/div&gt;
The fiftieth anniversary of &lt;span style=&quot;font-style: italic&quot;&gt;Physical Review Letters&lt;/span&gt; is a good opportunity to review the extraordinary progress of atomic, molecular, and optical physics reported in this journal during the past half-century. As both a witness and an actor of this story, I recall personal experiences and reflect about the past, present, and possible future of my field of research.</description>
 <pubDate>Mon, 13 Oct 2008 04:00:00 +0000</pubDate>
 <guid isPermaLink="false">2144 at </guid>
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<item>
 <title>Milestone Letters: Photonic band structure: The face-centered-cubic case</title>
 <link>http://prl.aps.org/50years/milestones/#1989</link>
 <description>&lt;p&gt;Photonic band structure: The face-centered-cubic case&lt;br/&gt;E. Yablonovitch and T. J. Gmitter&lt;br/&gt;Phys. Rev. Lett.  63, 1950 (1989)&lt;p&gt;Photonic band structure: The face-centered-cubic case employing nonspherical atoms&lt;br/&gt;E. Yablonovitch, T. J. Gmitter, and K. M. Leung&lt;br/&gt;Phys. Rev. Lett.  67, 2295 (1991)</description>
 <pubDate>Mon, 06 Oct 2008 04:00:00 +0000</pubDate>
 <guid isPermaLink="false">2082 at http://prl.aps.org</guid>
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<item>
 <title>Milestone Letters: Giant Magnetoresistance</title>
 <link>http://prl.aps.org/50years/milestones/#1988</link>
 <description>&lt;p&gt;&lt;span class = &quot;key&quot; style=&quot;font-size: 1.2em;&quot;&gt;Nobel Prize in Physics - 2007&lt;/span&gt;&lt;/p&gt;&lt;p&gt;Giant Magnetoresistance of (001)Fe/(001)Cr Magnetic Superlattices&lt;br/&gt;M. N. Baibich, J. M. Broto, A. Fert, F. Nguyen Van Dau, F. Petroff, P. Etienne, G. Creuzet, A. Friederich, and J. Chazelas&lt;br/&gt;Phys. Rev. Lett.  61, 2472 (1988)&lt;p&gt;Enhanced magnetoresistance in layered magnetic structures with antiferromagnetic interlayer exchange&lt;br/&gt;G. Binasch, P. Grünberg, F. Saurenbach, and W. Zinn&lt;br/&gt;Phys. Rev. B 39, 4828 (1989)</description>
 <pubDate>Mon, 22 Sep 2008 04:00:00 +0000</pubDate>
 <guid isPermaLink="false">2066 at http://prl.aps.org</guid>
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<item>
 <title>Milestone Letters: Laser Cooling</title>
 <link>http://prl.aps.org/50years/milestones/#1988</link>
 <description>&lt;p&gt;&lt;span class = &quot;key&quot; style=&quot;font-size: 1.2em;&quot;&gt;Nobel Prize in Physics - 1997&lt;/span&gt;&lt;/p&gt;&lt;p&gt;Observation of Atoms Laser Cooled below the Doppler Limit&lt;br/&gt;Paul D. Lett, Richard N. Watts, Christoph I. Westbrook, William D. Phillips, Phillip L. Gould, and Harold J. Metcalf&lt;br/&gt;Phys. Rev. Lett.  61, 169 (1988)&lt;p&gt;Laser Cooling below the One-Photon Recoil Energy by Velocity-Selective Coherent Population Trapping&lt;br/&gt;A. Aspect, E. Arimondo, R. Kaiser, N. Vansteenkiste, and C. Cohen-Tannoudji&lt;br/&gt;Phys. Rev. Lett.  61, 826 (1988)</description>
 <pubDate>Mon, 22 Sep 2008 04:00:00 +0000</pubDate>
 <guid isPermaLink="false">2065 at http://prl.aps.org</guid>
</item>
<item>
 <title>Milestone Letter: Superconductivity at 93 K in a new mixed-phase Y-Ba-Cu-O compound system at ambient pressure</title>
 <link>http://prl.aps.org/50years/milestones/#1987</link>
 <description>&lt;p&gt;Superconductivity at 93 K in a new mixed-phase Y-Ba-Cu-O compound system at ambient pressure&lt;br/&gt;M. K. Wu, J. R. Ashburn, C. J. Torng, P. H. Hor, R. L. Meng, L. Gao, Z. J. Huang, Y. Q. Wang, and C. W. Chu&lt;br/&gt;Phys. Rev. Lett.  58, 908 (1987)</description>
 <pubDate>Mon, 15 Sep 2008 04:00:00 +0000</pubDate>
 <guid isPermaLink="false">2026 at http://prl.aps.org</guid>
</item>
<item>
 <title>Milestone Letters: Neutrino burst from the supernova SN1987A</title>
 <link>http://prl.aps.org/50years/milestones/#1987</link>
 <description>&lt;p&gt;&lt;span class = &quot;key&quot; style=&quot;font-size: 1.2em;&quot;&gt;Nobel Prize in Physics - 2002&lt;/span&gt;&lt;/p&gt;&lt;p&gt;Observation of a neutrino burst from the supernova SN1987A&lt;br/&gt;K. Hirata &lt;i&gt;et al.&lt;/i&gt;&lt;br/&gt;Phys. Rev. Lett.  58, 1490 (1987)&lt;p&gt;Observation of a neutrino burst in coincidence with supernova 1987A in the Large Magellanic Cloud&lt;br/&gt;R. M. Bionta &lt;i&gt;et al.&lt;/i&gt;&lt;br/&gt;Phys. Rev. Lett.  58, 1494 (1987)</description>
 <pubDate>Mon, 15 Sep 2008 04:00:00 +0000</pubDate>
 <guid isPermaLink="false">2025 at http://prl.aps.org</guid>
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<item>
 <title>Milestone Letter: Atomic Force Microscope</title>
 <link>http://prl.aps.org/50years/milestones/#1986</link>
 <description>&lt;p&gt;Atomic Force Microscope&lt;br/&gt;G. Binnig, C. F. Quate, and Ch. Gerber&lt;br/&gt;Phys. Rev. Lett.  56, 930 (1986)</description>
 <pubDate>Mon, 08 Sep 2008 04:00:00 +0000</pubDate>
 <guid isPermaLink="false">2007 at http://prl.aps.org</guid>
</item>
<item>
 <title>Milestone Letter: Three-Dimensional Viscous Confinement and Cooling of Atoms by Resonance Radiation Pressure</title>
 <link>http://prl.aps.org/50years/milestones/#1985</link>
 <description>&lt;p&gt;&lt;span class = &quot;key&quot; style=&quot;font-size: 1.2em;&quot;&gt;Nobel Prize in Physics - 1997&lt;/span&gt;&lt;/p&gt;&lt;p&gt;Three-dimensional viscous confinement and cooling of atoms by resonance radiation pressure&lt;br/&gt;Steven Chu, L. Hollberg, J. E. Bjorkholm, Alex Cable, and A. Ashkin&lt;br/&gt;Phys. Rev. Lett.  55, 48 (1985)</description>
 <pubDate>Mon, 25 Aug 2008 04:00:00 +0000</pubDate>
 <guid isPermaLink="false">1991 at http://prl.aps.org</guid>
</item>
<item>
 <title>Milestone Letter: Metallic Phase with Long-Range Orientational Order and No Translational Symmetry</title>
 <link>http://prl.aps.org/50years/milestones/#1984</link>
 <description>&lt;p&gt;Metallic Phase with Long-Range Orientational Order and No Translational Symmetry&lt;br/&gt;D. Shechtman, I. Blech, D. Gratias, and J. W. Cahn&lt;br/&gt;Phys. Rev. Lett.  53, 1951 (1984)</description>
 <pubDate>Mon, 18 Aug 2008 04:00:00 +0000</pubDate>
 <guid isPermaLink="false">1980 at http://prl.aps.org</guid>
</item>
<item>
 <title>Milestone Letter: Anomalous Quantum Hall Effect: An Incompressible Quantum Fluid with Fractionally Charged Excitations</title>
 <link>http://prl.aps.org/50years/milestones/#1983</link>
 <description>&lt;p&gt;&lt;span class = &quot;key&quot; style=&quot;font-size: 1.2em;&quot;&gt;Nobel Prize in Physics - 1998&lt;/span&gt;&lt;/p&gt;&lt;p&gt;Anomalous Quantum Hall Effect: An Incompressible Quantum Fluid with Fractionally Charged Excitations&lt;br/&gt;R. B. Laughlin&lt;br/&gt;Phys. Rev. Lett.  50, 1395 (1983)</description>
 <pubDate>Mon, 11 Aug 2008 04:00:00 +0000</pubDate>
 <guid isPermaLink="false">1940 at http://prl.aps.org</guid>
</item>
<item>
 <title>Essay: Reflections on Physical Review Letters</title>
 <link>http://prl.aps.org/edannounce/PhysRevLett.101.050001</link>
 <description>&lt;div style = &quot;float: left; padding: 0em 1em;&quot;&gt;&lt;img src =&quot;/files/aps_announcement/thumb_lazarus.png&quot; alt = &quot;image&quot;/&gt;&lt;/div&gt;
During my tenure as APS Editor-in-Chief &lt;span style=&quot;font-style: italic&quot;&gt;Physical Review Letters&lt;/span&gt; changed from a journal whose authors were mostly from the U.S. to one whose authors were mostly from abroad. I encouraged authors to publicize their work even before their papers were accepted for publication. And I sought to raise the quality of the papers that were published even higher than before.</description>
 <pubDate>Thu, 31 Jul 2008 04:00:00 +0000</pubDate>
 <guid isPermaLink="false">2008 at </guid>
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<item>
 <title>Milestone Letter: Surface Studies by Scanning Tunneling Microscopy</title>
 <link>http://prl.aps.org/50years/milestones/#1982</link>
 <description>&lt;p&gt;&lt;span class = &quot;key&quot; style=&quot;font-size: 1.2em;&quot;&gt;Nobel Prize in Physics - 1986&lt;/span&gt;&lt;/p&gt;&lt;p&gt;Surface Studies by Scanning Tunneling Microscopy&lt;br/&gt;G. Binnig, H. Rohrer, Ch. Gerber, and E. Weibel&lt;br/&gt;Phys. Rev. Lett.  49, 57 (1982)</description>
 <pubDate>Mon, 28 Jul 2008 04:00:00 +0000</pubDate>
 <guid isPermaLink="false">1910 at http://prl.aps.org</guid>
</item>
<item>
 <title>Milestone Letter: Two-Dimensional Magnetotransport in the Extreme Quantum Limit</title>
 <link>http://prl.aps.org/50years/milestones/#1982</link>
 <description>&lt;p&gt;&lt;span class = &quot;key&quot; style=&quot;font-size: 1.2em;&quot;&gt;Nobel Prize in Physics - 1998&lt;/span&gt;&lt;/p&gt;&lt;p&gt;Two-Dimensional Magnetotransport in the Extreme Quantum Limit&lt;br/&gt;D. C. Tsui, H. L. Stormer, and A. C. Gossard&lt;br/&gt;Phys. Rev. Lett.  48, 1559 (1982)</description>
 <pubDate>Mon, 28 Jul 2008 04:00:00 +0000</pubDate>
 <guid isPermaLink="false">1909 at http://prl.aps.org</guid>
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<item>
 <title>Milestone Letters: Experimental Tests of Bell&#039;s Inequalities</title>
 <link>http://prl.aps.org/50years/milestones/#1981</link>
 <description>&lt;p&gt;Experimental Tests of Realistic Local Theories via Bell&#039;s Theorem&lt;br/&gt;Alain Aspect, Philippe Grangier, and G&amp;eacute;rard Roger&lt;br/&gt;Phys. Rev. Lett.  47, 460 (1981)&lt;p&gt;Experimental Realization of Einstein-Podolsky-Rosen-Bohm &lt;i&gt;Gedankenexperiment&lt;/i&gt;: A New Violation of Bell&#039;s Inequalities&lt;br/&gt;Alain Aspect, Philippe Grangier, and G&amp;eacute;rard Roger&lt;br/&gt;Phys. Rev. Lett.  49, 91 (1982)&lt;p&gt;Experimental Test of Bell&#039;s Inequalities Using Time-Varying Analyzers&lt;br/&gt;Alain Aspect, Jean Dalibard, and G&amp;eacute;rard Roger&lt;br/&gt;Phys. Rev. Lett.  49, 1804 (1982)</description>
 <pubDate>Mon, 21 Jul 2008 04:00:00 +0000</pubDate>
 <guid isPermaLink="false">1883 at http://prl.aps.org</guid>
</item>
<item>
 <title>Milestone Letter: New Method for High-Accuracy Determination of the Fine-Structure Constant Based on Quantized Hall Resistance</title>
 <link>http://prl.aps.org/50years/milestones/#1980</link>
 <description>&lt;p&gt;&lt;span class = &quot;key&quot; style=&quot;font-size: 1.2em;&quot;&gt;Nobel Prize in Physics - 1985&lt;/span&gt;&lt;/p&gt;&lt;p&gt;New Method for High-Accuracy Determination of the Fine-Structure Constant Based on Quantized Hall Resistance&lt;br/&gt;K. von Klitzing, G. Dorda, and M. Pepper&lt;br/&gt;Phys. Rev. Lett.  45, 494 (1980)</description>
 <pubDate>Mon, 14 Jul 2008 04:00:00 +0000</pubDate>
 <guid isPermaLink="false">1882 at http://prl.aps.org</guid>
</item>
<item>
 <title>Milestone Letter: Scaling Theory of Localization: Absence of Quantum Diffusion in Two Dimensions</title>
 <link>http://prl.aps.org/50years/milestones/#1979</link>
 <description>&lt;p&gt;Scaling Theory of Localization: Absence of Quantum Diffusion in Two Dimensions&lt;br/&gt;E. Abrahams, P. W. Anderson, D. C. Licciardello, and T. V. Ramakrishnan&lt;br/&gt;Phys. Rev. Lett.  42, 673 (1979)</description>
 <pubDate>Mon, 07 Jul 2008 04:00:00 +0000</pubDate>
 <guid isPermaLink="false">1855 at http://prl.aps.org</guid>
</item>
<item>
 <title>Milestone Letter: Theory of Two-Dimensional Melting</title>
 <link>http://prl.aps.org/50years/milestones/#1978</link>
 <description>&lt;p&gt;Theory of Two-Dimensional Melting&lt;br/&gt;B. I. Halperin and David R. Nelson&lt;br/&gt;Phys. Rev. Lett.  41, 121 (1978)</description>
 <pubDate>Mon, 30 Jun 2008 04:00:00 +0000</pubDate>
 <guid isPermaLink="false">1845 at http://prl.aps.org</guid>
</item>
<item>
 <title>Essay: Samuel Abraham Goudsmit (1902–1978)</title>
 <link>http://prl.aps.org/edannounce/PhysRevLett.101.010002</link>
 <description>&lt;div style = &quot;float: left; padding: 0em 1em;&quot;&gt;&lt;img src =&quot;/files/aps_announcement/thumb_PRLv101e010002.png&quot; alt = &quot;image&quot;/&gt;&lt;/div&gt;

When Sam Goudsmit was 23, he and George Uhlenbeck hypothesized that the electron had spin. Sam was a well-known atomic physicist working at the University of Michigan when World War II began. During the war he first worked on radar at the MIT Radiation Lab, and then in the waning days of the war in Europe he led a mission to determine how far the Nazis had gotten in developing an atomic bomb. After chairing the Physics Department at Brookhaven, in 1950 APS named Goudsmit Managing Editor of &lt;span style=&quot;font-style: italic&quot;&gt;Physical Review&lt;/span&gt; and &lt;span style=&quot;font-style: italic&quot;&gt;Reviews of Modern Physics&lt;/span&gt;; in 1966 he was named Editor-in-Chief. He founded &lt;span style=&quot;font-style: italic&quot;&gt;Physical Review Letters&lt;/span&gt; in 1958.</description>
 <pubDate>Mon, 30 Jun 2008 04:00:00 +0000</pubDate>
 <guid isPermaLink="false">1852 at </guid>
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<item>
 <title>Editorial: Changes in Publishing</title>
 <link>http://prl.aps.org/edannounce/PhysRevLett.100.240001</link>
 <description>I address advances in publishing methodology and technology from a personal perspective, via a brief account of my encounters with some of the changes that have taken place over the 50 years of PRL.
</description>
 <pubDate>Wed, 18 Jun 2008 04:00:00 +0000</pubDate>
 <guid isPermaLink="false">1843 at </guid>
</item>
<item>
 <title>Milestone Letter: Detection of Anisotropy in the Cosmic Blackbody Radiation</title>
 <link>http://prl.aps.org/50years/milestones/#1977</link>
 <description>&lt;p&gt;Detection of Anisotropy in the Cosmic Blackbody Radiation&lt;br/&gt;G. F. Smoot, M. V. Gorenstein, and R. A. Muller&lt;br/&gt;Phys. Rev. Lett.  39, 898 (1977)</description>
 <pubDate>Mon, 16 Jun 2008 04:00:00 +0000</pubDate>
 <guid isPermaLink="false">1824 at http://prl.aps.org</guid>
</item>
<item>
 <title>Milestone Letter: Electrical Conductivity in Doped Polyacetylene</title>
 <link>http://prl.aps.org/50years/milestones/#1977</link>
 <description>&lt;p&gt;&lt;span class = &quot;key&quot; style=&quot;font-size: 1.2em;&quot;&gt;Nobel Prize in Chemistry - 2000&lt;/span&gt;&lt;/p&gt;&lt;p&gt;Electrical Conductivity in Doped Polyacetylene&lt;br/&gt;C. K. Chiang, C. R. Fincher, Y. W. Park, A. J. Heeger, H. Shirakawa, E. J. Louis, S. C. Gau, and Alan G. MacDiarmid&lt;br/&gt;Phys. Rev. Lett.  39, 1098 (1977)</description>
 <pubDate>Mon, 16 Jun 2008 04:00:00 +0000</pubDate>
 <guid isPermaLink="false">1823 at http://prl.aps.org</guid>
</item>
<item>
 <title>Milestone Letters: Free-Electron Laser</title>
 <link>http://prl.aps.org/50years/milestones/#1976</link>
 <description>&lt;p&gt;Observation of Stimulated Emission of Radiation by Relativistic Electrons in a Spatially Periodic Transverse Magnetic Field&lt;br/&gt;Luis R. Elias, William M. Fairbank, John M. J. Madey, H. Alan Schwettman, and Todd I. Smith&lt;br/&gt;Phys. Rev. Lett.  36, 717 (1976)&lt;p&gt;First Operation of a Free-Electron Laser&lt;br/&gt;D. A. G. Deacon, L. R. Elias, J. M. J. Madey, G. J. Ramian, H. A. Schwettman, and T. I. Smith&lt;br/&gt;Phys. Rev. Lett.  38, 892 (1977)</description>
 <pubDate>Mon, 02 Jun 2008 04:00:00 +0000</pubDate>
 <guid isPermaLink="false">1804 at http://prl.aps.org</guid>
</item>
<item>
 <title>Milestone Letter: Evidence for Anomalous Lepton Production in e&lt;sup&gt;+&lt;/sup&gt;-e&lt;sup&gt;-&lt;/sup&gt; Annihilation</title>
 <link>http://prl.aps.org/50years/milestones/#1975</link>
 <description>&lt;p&gt;&lt;span class = &quot;key&quot; style=&quot;font-size: 1.2em;&quot;&gt;Nobel Prize in Physics - 1995&lt;/span&gt;&lt;/p&gt;&lt;p&gt;Evidence for Anomalous Lepton Production in e&lt;sup&gt;+&lt;/sup&gt;-e&lt;sup&gt;-&lt;/sup&gt; Annihilation&lt;br/&gt;M. L. Perl &lt;i&gt;et al.&lt;/i&gt;&lt;br/&gt;Phys. Rev. Lett.  35, 1489 (1975)</description>
 <pubDate>Mon, 19 May 2008 04:00:00 +0000</pubDate>
 <guid isPermaLink="false">1769 at http://prl.aps.org</guid>
</item>
<item>
 <title>Milestone Letters: Discovery of the &lt;i&gt;J/&amp;psi;&lt;/i&gt;</title>
 <link>http://prl.aps.org/50years/milestones/#1974</link>
 <description>&lt;p&gt;&lt;span class = &quot;key&quot; style=&quot;font-size: 1.2em;&quot;&gt;Nobel Prize in Physics - 1976&lt;/span&gt;&lt;/p&gt;&lt;p&gt;Experimental Observation of a Heavy Particle &lt;span style=&quot;font-style:italic&quot;&gt;J&lt;/span&gt;&lt;br/&gt;J. J. Aubert &lt;i&gt;et al.&lt;/i&gt;&lt;br/&gt;Phys. Rev. Lett.  33, 1404 (1974)&lt;p&gt;Discovery of a Narrow Resonance in &lt;i&gt;e&lt;/i&gt;&lt;sup&gt;+&lt;/sup&gt;&lt;i&gt;e&lt;/i&gt;&lt;sup&gt;-&lt;/sup&gt; Annihilation&lt;br/&gt;J.-E. Augustin &lt;i&gt;et al.&lt;/i&gt;&lt;br/&gt;Phys. Rev. Lett.  33, 1406 (1974)</description>
 <pubDate>Mon, 12 May 2008 04:00:00 +0000</pubDate>
 <guid isPermaLink="false">1736 at http://prl.aps.org</guid>
</item>
<item>
 <title>Milestone Letters: Asymptotic Freedom</title>
 <link>http://prl.aps.org/50years/milestones/#1973</link>
 <description>&lt;p&gt;&lt;span class = &quot;key&quot; style=&quot;font-size: 1.2em;&quot;&gt;Nobel Prize in Physics - 2004&lt;/span&gt;&lt;/p&gt;&lt;p&gt;Ultraviolet Behavior of Non-Abelian Gauge Theories&lt;br/&gt;David J. Gross and Frank Wilczek&lt;br/&gt;Phys. Rev. Lett.  30, 1343 (1973)&lt;p&gt;Reliable Perturbative Results for Strong Interactions?&lt;br/&gt;H. David Politzer&lt;br/&gt;Phys. Rev. Lett.  30, 1346 (1973)</description>
 <pubDate>Mon, 05 May 2008 04:00:00 +0000</pubDate>
 <guid isPermaLink="false">1734 at http://prl.aps.org</guid>
</item>
<item>
 <title>Editorial: Helpful Reviews</title>
 <link>http://prl.aps.org/edannounce/PhysRevLett.100.170001</link>
 <description>We recently stated here that peer review is a source of great strength for APS journals, but did not discuss why. What are the elements of a helpful report? Who benefits from such a report, and how?</description>
 <pubDate>Tue, 29 Apr 2008 04:00:00 +0000</pubDate>
 <guid isPermaLink="false">1770 at </guid>
</item>
<item>
 <title>Milestone Letter: Interpretation of Recent Results on He&lt;sup&gt;3&lt;/sup&gt; below 3 mK: A New Liquid Phase?</title>
 <link>http://prl.aps.org/50years/milestones/#1972</link>
 <description>&lt;p&gt;&lt;span class = &quot;key&quot; style=&quot;font-size: 1.2em;&quot;&gt;Nobel Prize in Physics - 2003&lt;/span&gt;&lt;/p&gt;&lt;p&gt;Interpretation of Recent Results on He&lt;sup&gt;3&lt;/sup&gt; below 3 mK: A New Liquid Phase?&lt;br/&gt;A. J. Leggett&lt;br/&gt;Phys. Rev. Lett.  29, 1227 (1972)</description>
 <pubDate>Mon, 21 Apr 2008 04:00:00 +0000</pubDate>
 <guid isPermaLink="false">1712 at http://prl.aps.org</guid>
</item>
<item>
 <title>Milestone Letters: Helium-3</title>
 <link>http://prl.aps.org/50years/milestones/#1972</link>
 <description>&lt;p&gt;&lt;span class = &quot;key&quot; style=&quot;font-size: 1.2em;&quot;&gt;Nobel Prize in Physics - 1996&lt;/span&gt;&lt;/p&gt;&lt;p&gt;Evidence for a New Phase of Solid He&lt;sup&gt;3&lt;/sup&gt;&lt;br/&gt;D. D. Osheroff, R. C. Richardson, and D. M. Lee&lt;br/&gt;Phys. Rev. Lett.  28, 885 (1972)&lt;p&gt;New Magnetic Phenomena in Liquid He&lt;sup&gt;3&lt;/sup&gt; below 3 mK&lt;br/&gt;D. D. Osheroff, W. J. Gully, R. C. Richardson, and D. M. Lee&lt;br/&gt;Phys. Rev. Lett.  29, 920 (1972)</description>
 <pubDate>Mon, 21 Apr 2008 04:00:00 +0000</pubDate>
 <guid isPermaLink="false">1711 at http://prl.aps.org</guid>
</item>
<item>
 <title>Milestone Letters: Critical Exponents</title>
 <link>http://prl.aps.org/50years/milestones/#1972</link>
 <description>&lt;p&gt;Critical Exponents in 3.99 Dimensions&lt;br/&gt;Kenneth G. Wilson and Michael E. Fisher&lt;br/&gt;Phys. Rev. Lett.  28, 240 (1972)&lt;p&gt;Feynman-Graph Expansion for Critical Exponents&lt;br/&gt;Kenneth G. Wilson&lt;br/&gt;Phys. Rev. Lett.  28, 548 (1972)</description>
 <pubDate>Mon, 21 Apr 2008 04:00:00 +0000</pubDate>
 <guid isPermaLink="false">1710 at http://prl.aps.org</guid>
</item>
<item>
 <title>Milestone Letter: Eight-Vertex Model in Lattice Statistics</title>
 <link>http://prl.aps.org/50years/milestones/#1971</link>
 <description>&lt;p&gt;Eight-Vertex Model in Lattice Statistics&lt;br/&gt;R. J. Baxter&lt;br/&gt;Phys. Rev. Lett.  26, 832 (1971)</description>
 <pubDate>Mon, 14 Apr 2008 04:00:00 +0000</pubDate>
 <guid isPermaLink="false">1709 at http://prl.aps.org</guid>
</item>
<item>
 <title>Milestone Letter: Acceleration and Trapping of Particles by Radiation Pressure</title>
 <link>http://prl.aps.org/50years/milestones/#1970</link>
 <description>&lt;p&gt;Acceleration and Trapping of Particles by Radiation Pressure&lt;br/&gt;A. Ashkin&lt;br/&gt;Phys. Rev. Lett.  24, 156 (1970)</description>
 <pubDate>Mon, 07 Apr 2008 04:00:00 +0000</pubDate>
 <guid isPermaLink="false">1708 at http://prl.aps.org</guid>
</item>
<item>
 <title>Milestone Letters: High-Energy Inelastic Electron-Proton Scattering</title>
 <link>http://prl.aps.org/50years/milestones/#1969</link>
 <description>&lt;p&gt;&lt;span class = &quot;key&quot; style=&quot;font-size: 1.2em;&quot;&gt;Nobel Prize in Physics - 1990&lt;/span&gt;&lt;/p&gt;&lt;p&gt;High-Energy Inelastic &lt;span style=&quot;font-style:italic&quot;&gt;e&lt;/span&gt;-&lt;span style=&quot;font-style:italic&quot;&gt;p&lt;/span&gt; Scattering at 6° and 10°&lt;br/&gt;E. D. Bloom, D. H. Coward, H. DeStaebler, J. Drees, G. Miller, L. W. Mo, R. E. Taylor, M. Breidenbach, J. I. Friedman, G. C. Hartmann, and H. W. Kendall&lt;br/&gt;Phys. Rev. Lett.  23, 930 (1969)&lt;p&gt;Observed Behavior of Highly Inelastic Electron-Proton Scattering&lt;br/&gt;M. Breidenbach, J. I. Friedman, H. W. Kendall, E. D. Bloom, D. H. Coward, H. DeStaebler, J. Drees, L. W. Mo, and R. E. Taylor&lt;br/&gt;Phys. Rev. Lett.  23, 935 (1969)</description>
 <pubDate>Mon, 24 Mar 2008 04:00:00 +0000</pubDate>
 <guid isPermaLink="false">1689 at http://prl.aps.org</guid>
</item>
<item>
 <title>Milestone Letter: Search for Neutrinos from the Sun</title>
 <link>http://prl.aps.org/50years/milestones/#1968</link>
 <description>&lt;p&gt;&lt;span class = &quot;key&quot; style=&quot;font-size: 1.2em;&quot;&gt;Nobel Prize in Physics - 2002&lt;/span&gt;&lt;/p&gt;&lt;p&gt;Search for Neutrinos from the Sun&lt;br/&gt;Raymond Davis, Don S. Harmer, and Kenneth C. Hoffman&lt;br/&gt;Phys. Rev. Lett.  20, 1205 (1968)&lt;p&gt;Present Status of the Theoretical Predictions for the &lt;sup&gt;37&lt;/sup&gt;Cl Solar-Neutrino Experiment&lt;sup&gt;*&lt;/sup&gt;&lt;br/&gt;John N. Bahcall, Neta A. Bahcall, and Giora Shaviv&lt;br/&gt;Phys. Rev. Lett.  20, 1209 (1968)</description>
 <pubDate>Mon, 17 Mar 2008 04:00:00 +0000</pubDate>
 <guid isPermaLink="false">1523 at http://prl.aps.org</guid>
</item>
<item>
 <title>Editorial: Successful Letters</title>
 <link>http://prl.aps.org/edannounce/PhysRevLett.100.100001</link>
 <description>Physicists borrowed the word &quot;quark&quot; from &lt;i&gt;Finnegans Wake&lt;/i&gt;, but James Joyce had no obvious connection to physics.  However, all scientists, including physicists, must know how to write.</description>
 <pubDate>Thu, 13 Mar 2008 04:00:00 +0000</pubDate>
 <guid isPermaLink="false">1687 at </guid>
</item>
<item>
 <title>Milestone Letter: A Model of Leptons</title>
 <link>http://prl.aps.org/50years/milestones/#1967</link>
 <description>&lt;p&gt;&lt;span class = &quot;key&quot; style=&quot;font-size: 1.2em;&quot;&gt;Nobel Prize in Physics - 1979&lt;/span&gt;&lt;/p&gt;&lt;p&gt;A Model of Leptons&lt;br/&gt;Steven Weinberg&lt;br/&gt;Phys. Rev. Lett.  19, 1264 (1967)</description>
 <pubDate>Mon, 10 Mar 2008 04:00:00 +0000</pubDate>
 <guid isPermaLink="false">1490 at http://prl.aps.org</guid>
</item>
<item>
 <title>Milestone Letter: Absence of Ferromagnetism or Antiferromagnetism in One- or Two-Dimensional Isotropic Heisenberg Models</title>
 <link>http://prl.aps.org/50years/milestones/#1966</link>
 <description>&lt;p&gt;Absence of Ferromagnetism or Antiferromagnetism in One- or Two-Dimensional Isotropic Heisenberg Models&lt;br/&gt;N. D. Mermin and H. Wagner&lt;br/&gt;Phys. Rev. Lett.  17, 1133 (1966)</description>
 <pubDate>Mon, 03 Mar 2008 05:00:00 +0000</pubDate>
 <guid isPermaLink="false">1469 at http://prl.aps.org</guid>
</item>
<item>
 <title>Milestone Letter: Interaction of &quot;Solitons&quot; in a Collisionless Plasma and the Recurrence of Initial States</title>
 <link>http://prl.aps.org/50years/milestones/#1965</link>
 <description>&lt;p&gt;Interaction of &quot;Solitons&quot; in a Collisionless Plasma and the Recurrence of Initial States&lt;br/&gt;N. J. Zabusky and M. D. Kruskal&lt;br/&gt;Phys. Rev. Lett.  15, 240 (1965)</description>
 <pubDate>Mon, 25 Feb 2008 05:00:00 +0000</pubDate>
 <guid isPermaLink="false">1443 at http://prl.aps.org</guid>
</item>
<item>
 <title>Essay: The Tau Lepton and Thirty Years of Changes in Elementary Particle Physics Research</title>
 <link>http://prl.aps.org/edannounce/PhysRevLett.100.070001</link>
 <description>Starting with the 1975 discovery of the tau lepton, I look back on the last three decades of change in the substance and style of experimental and theoretical research in elementary particle physics. I recount the major accomplishments of those decades and predict a bright future for particle physics in the next two decades. Turning to three problems, I lament the change in theoretical style and taste, I discuss the growth in the complexity, size, and cost of particle physics experiments, and I conclude with a pessimistic comment on the size of particle physics collaborations.</description>
 <pubDate>Fri, 22 Feb 2008 05:00:00 +0000</pubDate>
 <guid isPermaLink="false">1521 at </guid>
</item>
<item>
 <title>Milestone Letter: Generating masses via symmetry breaking</title>
 <link>http://prl.aps.org/50years/milestones/#1964</link>
 <description>&lt;p&gt;Broken Symmetry and the Mass of Gauge Vector Mesons&lt;br/&gt;F. Englert and R. Brout&lt;br/&gt;Phys. Rev. Lett.  13, 321 (1964)&lt;p&gt;Broken Symmetries and the Masses of Gauge Bosons&lt;br/&gt;Peter W. Higgs&lt;br/&gt;Phys. Rev. Lett.  13, 508 (1964)&lt;p&gt;Global Conservation Laws and Massless Particles&lt;br/&gt;G. S. Guralnik, C. R. Hagen, and T. W. Kibble&lt;br/&gt;Phys. Rev. Lett.  13, 585 (1964)</description>
 <pubDate>Mon, 18 Feb 2008 05:00:00 +0000</pubDate>
 <guid isPermaLink="false">1427 at http://prl.aps.org</guid>
</item>
<item>
 <title>Milestone Letter: Evidence for the 2&amp;#x3C0; decay of the &lt;i&gt;Κ&lt;/i&gt;&lt;sub&gt;2&lt;/sub&gt;&lt;sup&gt;0&lt;/sup&gt; Meson</title>
 <link>http://prl.aps.org/50years/milestones/#1964</link>
 <description>&lt;p&gt;&lt;span class = &quot;key&quot; style=&quot;font-size: 1.2em;&quot;&gt;Nobel Prize in Physics - 1980&lt;/span&gt;&lt;/p&gt;&lt;p&gt;Evidence for the 2&amp;#x3C0; decay of the &lt;i&gt;Κ&lt;/i&gt;&lt;sub&gt;2&lt;/sub&gt;&lt;sup&gt;0&lt;/sup&gt; Meson&lt;br/&gt;J. H. Christenson, J. W. Cronin, V. L. Fitch, and R. Turlay&lt;br/&gt;Phys. Rev. Lett.  13, 138 (1964)</description>
 <pubDate>Mon, 18 Feb 2008 05:00:00 +0000</pubDate>
 <guid isPermaLink="false">1426 at http://prl.aps.org</guid>
</item>
<item>
 <title>Milestone Letter: Gravitational Field of a Spinning Mass as an Example of Algebraically Special Metrics</title>
 <link>http://prl.aps.org/50years/milestones/#1963</link>
 <description>&lt;p&gt;Gravitational Field of a Spinning Mass as an Example of Algebraically Special Metrics&lt;br/&gt;Roy P. Kerr&lt;br/&gt;Phys. Rev. Lett.  11, 237 (1963)</description>
 <pubDate>Mon, 11 Feb 2008 05:00:00 +0000</pubDate>
 <guid isPermaLink="false">1317 at http://prl.aps.org</guid>
</item>
<item>
 <title>Milestone Letter: Photon Correlations</title>
 <link>http://prl.aps.org/50years/milestones/#1963</link>
 <description>&lt;p&gt;&lt;span class = &quot;key&quot; style=&quot;font-size: 1.2em;&quot;&gt;Nobel Prize in Physics - 2005&lt;/span&gt;&lt;/p&gt;&lt;p&gt;Photon Correlations&lt;br/&gt;Roy J. Glauber&lt;br/&gt;Phys. Rev. Lett.  10, 84 (1963)</description>
 <pubDate>Mon, 11 Feb 2008 05:00:00 +0000</pubDate>
 <guid isPermaLink="false">1316 at http://prl.aps.org</guid>
</item>
<item>
 <title>Milestone Letter: Coherent Light Emission From GaAs Junctions</title>
 <link>http://prl.aps.org/50years/milestones/#1962</link>
 <description>&lt;p&gt;Coherent Light Emission from GaAs Junctions&lt;br/&gt;R. N. Hall, G. E. Fenner, J. D. Kingsley, T. J. Soltys, and R. O. Carlson&lt;br/&gt;Phys. Rev. Lett.  9, 366 (1962)</description>
 <pubDate>Mon, 04 Feb 2008 05:00:00 +0000</pubDate>
 <guid isPermaLink="false">1314 at http://prl.aps.org</guid>
</item>
<item>
 <title>Milestone Letter: Evidence for X-Rays from Sources outside Solar System</title>
 <link>http://prl.aps.org/50years/milestones/#1962</link>
 <description>&lt;p&gt;&lt;span class = &quot;key&quot; style=&quot;font-size: 1.2em;&quot;&gt;Nobel Prize in Physics - 2002&lt;/span&gt;&lt;/p&gt;&lt;p&gt;Evidence for X Rays from Sources Outside the Solar System&lt;br/&gt;Riccardo Giacconi, Herbert Gursky, Frank R. Paolini, and Bruno B. Rossi&lt;br/&gt;Phys. Rev. Lett.  9, 439 (1962)</description>
 <pubDate>Mon, 04 Feb 2008 05:00:00 +0000</pubDate>
 <guid isPermaLink="false">1309 at http://prl.aps.org</guid>
</item>
<item>
 <title>Milestone Letter: Observation of High-Energy Neutrino Reactions and the Existence of Two Kinds of Neutrinos</title>
 <link>http://prl.aps.org/50years/milestones/#1962</link>
 <description>&lt;p&gt;&lt;span class = &quot;key&quot; style=&quot;font-size: 1.2em;&quot;&gt;Nobel Prize in Physics - 1988&lt;/span&gt;&lt;/p&gt;&lt;p&gt;Observation of High-Energy Neutrino Reactions and the Existence of Two Kinds of Neutrinos&lt;br/&gt;G. Danby, J-M. Gaillard, K. Goulianos, L. M. Lederman, N. Mistry, M. Schwartz, and J. Steinberger&lt;br/&gt;Phys. Rev. Lett.  9, 36 (1962)</description>
 <pubDate>Mon, 04 Feb 2008 05:00:00 +0000</pubDate>
 <guid isPermaLink="false">1308 at http://prl.aps.org</guid>
</item>
<item>
 <title>Editorial: Peer Review per Physical Review</title>
 <link>http://prl.aps.org/edannounce/PhysRevLett.100.050001</link>
 <description>We editors often say, and also often hear, that the great strength of &lt;span style=&quot;font-style: italic&quot;&gt;Physical Review&lt;/span&gt; and &lt;span style=&quot;font-style: italic&quot;&gt;Physical Review Letters&lt;/span&gt; lies in the extensive peer review that submitted manuscripts receive. This widely held view is a natural topic for our discussion surrounding the 50th anniversary of &lt;span style=&quot;font-style: italic&quot;&gt;PRL&lt;/span&gt;.</description>
 <pubDate>Mon, 04 Feb 2008 05:00:00 +0000</pubDate>
 <guid isPermaLink="false">1465 at </guid>
</item>
<item>
 <title>Milestone Letter: Quantized Flux in Superconducting Cylinders</title>
 <link>http://prl.aps.org/50years/milestones/#1961</link>
 <description>&lt;p&gt;Experimental Evidence for Quantized Flux in Superconducting Cylinders&lt;br/&gt;Bascom S. Deaver and William M. Fairbank&lt;br/&gt;Phys. Rev. Lett.  7, 43 (1961)&lt;p&gt;Theoretical Considerations Concerning Quantized Magnetic Flux In Superconducting Cylinders&lt;br/&gt;N. Byers and C. N. Yang&lt;br/&gt;Phys. Rev. Lett.  7, 46 (1961)</description>
 <pubDate>Mon, 28 Jan 2008 05:00:00 +0000</pubDate>
 <guid isPermaLink="false">1303 at http://prl.aps.org</guid>
</item>
<item>
 <title>Milestone Letter: Generation of Optical Harmonics</title>
 <link>http://prl.aps.org/50years/milestones/#1961</link>
 <description>&lt;p&gt;Generation of Optical Harmonics&lt;br/&gt;P. A. Franken, A. E. Hill, C. W. Peters, and G. Weinreich&lt;br/&gt;Phys. Rev. Lett.  7, 118 (1961)</description>
 <pubDate>Mon, 28 Jan 2008 05:00:00 +0000</pubDate>
 <guid isPermaLink="false">1301 at http://prl.aps.org</guid>
</item>
<item>
 <title>Milestone Letter: Ivar Giaever&#039;s Nobel Prize papers</title>
 <link>http://prl.aps.org/50years/milestones/#1960</link>
 <description>&lt;p&gt;&lt;span class = &quot;key&quot; style=&quot;font-size: 1.2em;&quot;&gt;Nobel Prize in Physics - 1973&lt;/span&gt;&lt;/p&gt;&lt;p&gt;Energy Gap in Superconductors Measured by Electron Tunneling&lt;br/&gt;Ivar Giaever&lt;br/&gt;Phys. Rev. Lett.  5, 147 (1960)&lt;p&gt;Electron Tunneling Between Two Superconductors&lt;br/&gt;Ivar Giaever&lt;br/&gt;Phys. Rev. Lett.  5, 464 (1960)</description>
 <pubDate>Mon, 21 Jan 2008 05:00:00 +0000</pubDate>
 <guid isPermaLink="false">1258 at http://prl.aps.org</guid>
</item>
<item>
 <title>Milestone Letter: Apparent Weight of Photons</title>
 <link>http://prl.aps.org/50years/milestones/#1960</link>
 <description>&lt;p&gt;Apparent Weight of Photons&lt;br/&gt;R. V. Pound and G. A. Rebka&lt;br/&gt;Phys. Rev. Lett.  4, 337 (1960)</description>
 <pubDate>Mon, 21 Jan 2008 05:00:00 +0000</pubDate>
 <guid isPermaLink="false">1256 at http://prl.aps.org</guid>
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<item>
 <title>Essay: Physical Review Letters; Sam Goudsmit’s Vision</title>
 <link>http://prl.aps.org/edannounce/PhysRevLett.100.020001</link>
 <description>Sam Goudsmit implemented his vision of converting the Letters section of &lt;span class=&quot;italic&quot;&gt;Physical Review&lt;/span&gt; into a distinct journal fifty years ago. &lt;span class=&quot;italic&quot;&gt;Physical Review Letters&lt;/span&gt; was designed to publish “only papers that really deserve rapid communication.” The new journal became so successful with physicists throughout the world that &lt;span class=&quot;italic&quot;&gt;Physical Review Letters&lt;/span&gt; now publishes 3500 Letters per year. </description>
 <pubDate>Fri, 18 Jan 2008 05:00:00 +0000</pubDate>
 <guid isPermaLink="false">1421 at </guid>
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 <title>Milestone Letter: Calculation of Partition Functions</title>
 <link>http://prl.aps.org/50years/milestones/#1959</link>
 <description>&lt;p&gt;Calculation of Partition Functions&lt;br/&gt;J. Hubbard&lt;br/&gt;Phys. Rev. Lett.  3, 77 (1959)</description>
 <pubDate>Mon, 14 Jan 2008 05:00:00 +0000</pubDate>
 <guid isPermaLink="false">1254 at http://prl.aps.org</guid>
</item>
<item>
 <title>Milestone Letter: Lattice Vibrations in Silicon and Germanium</title>
 <link>http://prl.aps.org/50years/milestones/#1959</link>
 <description>&lt;p&gt;Lattice Vibrations in Silicon and Germanium&lt;br/&gt;B. N. Brockhouse&lt;br/&gt;Phys. Rev. Lett.  2, 256 (1959)</description>
 <pubDate>Mon, 14 Jan 2008 05:00:00 +0000</pubDate>
 <guid isPermaLink="false">1253 at http://prl.aps.org</guid>
</item>
<item>
 <title>Editorial: Physical Review Letters at 50</title>
 <link>http://prl.aps.org/edannounce/PhysRevLett.100.010001</link>
 <description>During the course of the 50th year we will publish a series of Editorials on issues facing the journals as well as on scientific publishing. The first Editorial is more of an introduction to features and events we are planning for the year, and which we will announce frequently on this web site.</description>
 <pubDate>Wed, 02 Jan 2008 05:00:00 +0000</pubDate>
 <guid isPermaLink="false">1276 at </guid>
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<item>
 <title>Milestone Letter: Two-Fluid Model of Superconductivity</title>
 <link>http://prl.aps.org/50years/milestones/#1958</link>
 <description>&lt;p&gt;Two-Fluid Model of Superconductivity&lt;br/&gt;John Bardeen&lt;br/&gt;Phys. Rev. Lett.  1, 399 (1958)</description>
 <pubDate>Sun, 11 Nov 2007 05:00:00 +0000</pubDate>
 <guid isPermaLink="false">1252 at http://prl.aps.org</guid>
</item>
<item>
 <title>Milestone Letter: Element No. 102</title>
 <link>http://prl.aps.org/50years/milestones/#1958</link>
 <description>&lt;p&gt;Element No. 102&lt;br/&gt;A. Ghiorso, T. Sikkeland, J. R. Walton, and G. T. Seaborg&lt;br/&gt;Phys. Rev. Lett.  1, 18 (1958)</description>
 <pubDate>Sun, 11 Nov 2007 05:00:00 +0000</pubDate>
 <guid isPermaLink="false">1216 at http://prl.aps.org</guid>
</item>
</channel>

