http://prl.aps.org/ Recently published articles in Phys. Rev. Lett. in the Table of Content section "General Physics: Statistical and Quantum Mechanics, Quantum Information, etc." en-us Copyright (c) 2009 The American Physical Society 2009-11-22T06:20:10-05:00 assocpub@aps.org rss@aps.org hourly 4 2009-11-22T06:20:10-05:00 rss@aps.org http://link.aps.org/doi/10.1103/PhysRevLett.103.210501 Author(s): Runyao Duan, Yuan Feng, and Mingsheng Ying<br/>We provide a feasible necessary and sufficient condition for when an unknown quantum operation (quantum device) secretly selected from a set of known quantum operations can be identified perfectly within a finite number of queries, and thus complete the characterization of the perfect distinguishabi...<br/>[Phys. Rev. Lett. 103, 210501] Published Fri Nov 20, 2009 Runyao Duan, Yuan Feng, and Mingsheng Ying 2009-11-20T00:00:00-05:00 Personal use only, all commercial or other reuse prohibited 10.1103/PhysRevLett.103.210501 Phys. Rev. Lett. 103, 210501 text/html article Physical Review Letters 103 21 2009-11-20T00:00:00-05:00 210501 General Physics: Statistical and Quantum Mechanics, Quantum Information, etc. General Physics: Statistical and Quantum Mechanics, Quantum Information, etc. http://link.aps.org/doi/10.1103/PhysRevLett.103.210404 Author(s): M. Kormos, G. Mussardo, and A. Trombettoni<br/>We present a novel method to compute expectation values in the Lieb-Liniger model both at zero and finite temperature. These quantities, relevant in the physics of one-dimensional ultracold Bose gases, are expressed by a series that has a remarkable behavior of convergence. Among other results, we s...<br/>[Phys. Rev. Lett. 103, 210404] Published Fri Nov 20, 2009 M. Kormos, G. Mussardo, and A. Trombettoni 2009-11-20T00:00:00-05:00 Personal use only, all commercial or other reuse prohibited 10.1103/PhysRevLett.103.210404 Phys. Rev. Lett. 103, 210404 text/html article Physical Review Letters 103 21 2009-11-20T00:00:00-05:00 210404 General Physics: Statistical and Quantum Mechanics, Quantum Information, etc. General Physics: Statistical and Quantum Mechanics, Quantum Information, etc. http://link.aps.org/doi/10.1103/PhysRevLett.103.210403 Author(s): Piotr Magierski, Gabriel Wlazłowski, Aurel Bulgac, and Joaquín E. Drut<br/>We calculate the one-body temperature Green’s (Matsubara) function of the unitary Fermi gas via quantum Monte Carlo, and extract the spectral weight function A(p,ω) using the methods of maximum entropy and singular value decomposition. From A(p,ω) we determine the quasiparticle spectrum, which ...<br/>[Phys. Rev. Lett. 103, 210403] Published Thu Nov 19, 2009 Piotr Magierski, Gabriel Wlazłowski, Aurel Bulgac, and Joaquín E. Drut 2009-11-19T00:00:00-05:00 Personal use only, all commercial or other reuse prohibited 10.1103/PhysRevLett.103.210403 Phys. Rev. Lett. 103, 210403 text/html article Physical Review Letters 103 21 2009-11-19T00:00:00-05:00 210403 General Physics: Statistical and Quantum Mechanics, Quantum Information, etc. General Physics: Statistical and Quantum Mechanics, Quantum Information, etc. http://link.aps.org/doi/10.1103/PhysRevLett.103.210402 Author(s): Krzysztof Sacha, Cord A. Müller, Dominique Delande, and Jakub Zakrzewski<br/>At low temperature, a quasi-one-dimensional ensemble of atoms with an attractive interaction forms a bright soliton. When exposed to a weak and smooth external potential, the shape of the soliton is hardly modified, but its center-of-mass motion is affected. We show that in a spatially correlated di...<br/>[Phys. Rev. Lett. 103, 210402] Published Tue Nov 17, 2009 Krzysztof Sacha, Cord A. Müller, Dominique Delande, and Jakub Zakrzewski 2009-11-17T00:00:00-05:00 Personal use only, all commercial or other reuse prohibited 10.1103/PhysRevLett.103.210402 Phys. Rev. Lett. 103, 210402 text/html article Physical Review Letters 103 21 2009-11-17T00:00:00-05:00 210402 General Physics: Statistical and Quantum Mechanics, Quantum Information, etc. General Physics: Statistical and Quantum Mechanics, Quantum Information, etc. http://link.aps.org/doi/10.1103/PhysRevLett.103.210401 Author(s): Heinz-Peter Breuer, Elsi-Mari Laine, and Jyrki Piilo<br/>We construct a general measure for the degree of non-Markovian behavior in open quantum systems. This measure is based on the trace distance which quantifies the distinguishability of quantum states. It represents a functional of the dynamical map describing the time evolution of physical states, an...<br/><img src="http://prola.aps.org/graphics/prlsugg30x30.gif" width="30" height="30" alt="PRL Editors' Suggestion"/><br/>[Phys. Rev. Lett. 103, 210401] Published Mon Nov 16, 2009 Heinz-Peter Breuer, Elsi-Mari Laine, and Jyrki Piilo 2009-11-16T00:00:00-05:00 Personal use only, all commercial or other reuse prohibited 10.1103/PhysRevLett.103.210401 Phys. Rev. Lett. 103, 210401 text/html article Physical Review Letters 103 21 2009-11-16T00:00:00-05:00 210401 General Physics: Statistical and Quantum Mechanics, Quantum Information, etc. General Physics: Statistical and Quantum Mechanics, Quantum Information, etc. http://link.aps.org/doi/10.1103/PhysRevLett.103.200503 Author(s): T. Monz, K. Kim, A. S. Villar, P. Schindler, M. Chwalla, M. Riebe, C. F. Roos, H. Häffner, W. Hänsel, M. Hennrich, and R. Blatt<br/>Any residual coupling of a quantum computer to the environment results in computational errors. Encoding quantum information in a so-called decoherence-free subspace provides means to avoid these errors. Despite tremendous progress in employing this technique to extend memory storage times by orders...<br/>[Phys. Rev. Lett. 103, 200503] Published Fri Nov 13, 2009 T. Monz, K. Kim, A. S. Villar, P. Schindler, M. Chwalla, M. Riebe, C. F. Roos, H. Häffner, W. Hänsel, M. Hennrich, and R. Blatt 2009-11-13T00:00:00-05:00 Personal use only, all commercial or other reuse prohibited 10.1103/PhysRevLett.103.200503 Phys. Rev. Lett. 103, 200503 text/html article Physical Review Letters 103 20 2009-11-13T00:00:00-05:00 200503 General Physics: Statistical and Quantum Mechanics, Quantum Information, etc. General Physics: Statistical and Quantum Mechanics, Quantum Information, etc. http://link.aps.org/doi/10.1103/PhysRevLett.103.200404 Author(s): H. Wang, M. Hofheinz, M. Ansmann, R. C. Bialczak, Erik Lucero, M. Neeley, A. D. O’Connell, D. Sank, M. Weides, J. Wenner, A. N. Cleland, and John M. Martinis<br/>Quantum states inevitably decay with time into a probabilistic mixture of classical states due to their interaction with the environment and measurement instrumentation. We present the first measurement of the decoherence dynamics of complex photon states in a condensed-matter system. By controllabl...<br/>[Phys. Rev. Lett. 103, 200404] Published Fri Nov 13, 2009 H. Wang, M. Hofheinz, M. Ansmann, R. C. Bialczak, Erik Lucero, M. Neeley, A. D. O’Connell, D. Sank, M. Weides, J. Wenner, A. N. Cleland, and John M. Martinis 2009-11-13T00:00:00-05:00 Personal use only, all commercial or other reuse prohibited 10.1103/PhysRevLett.103.200404 Phys. Rev. Lett. 103, 200404 text/html article Physical Review Letters 103 20 2009-11-13T00:00:00-05:00 200404 General Physics: Statistical and Quantum Mechanics, Quantum Information, etc. General Physics: Statistical and Quantum Mechanics, Quantum Information, etc. http://link.aps.org/doi/10.1103/PhysRevLett.103.200601 Author(s): C. E. Creffield and F. Sols<br/>We study the response of a Bose-Einstein condensate to an unbiased periodic driving potential. By controlling the space and time symmetries of the driving we show how a directed current can be induced, producing a coherent quantum ratchet. Weak driving induces a regular behavior, and space and time ...<br/>[Phys. Rev. Lett. 103, 200601] Published Thu Nov 12, 2009 C. E. Creffield and F. Sols 2009-11-12T00:00:00-05:00 Personal use only, all commercial or other reuse prohibited 10.1103/PhysRevLett.103.200601 Phys. Rev. Lett. 103, 200601 text/html article Physical Review Letters 103 20 2009-11-12T00:00:00-05:00 200601 General Physics: Statistical and Quantum Mechanics, Quantum Information, etc. General Physics: Statistical and Quantum Mechanics, Quantum Information, etc. http://link.aps.org/doi/10.1103/PhysRevLett.103.200403 Author(s): G. J. Conduit and B. D. Simons<br/>Alongside superfluidity, itinerant (Stoner) ferromagnetism remains one of the most well-characterized phases of correlated Fermi systems. A recent experiment has reported the first evidence for novel phase behavior on the repulsive side of the Feshbach resonance in a two-component ultracold Fermi ga...<br/>[Phys. Rev. Lett. 103, 200403] Published Thu Nov 12, 2009 G. J. Conduit and B. D. Simons 2009-11-12T00:00:00-05:00 Personal use only, all commercial or other reuse prohibited 10.1103/PhysRevLett.103.200403 Phys. Rev. Lett. 103, 200403 text/html article Physical Review Letters 103 20 2009-11-12T00:00:00-05:00 200403 General Physics: Statistical and Quantum Mechanics, Quantum Information, etc. General Physics: Statistical and Quantum Mechanics, Quantum Information, etc. http://link.aps.org/doi/10.1103/PhysRevLett.103.200502 Author(s): Libby Heaney and Vlatko Vedral<br/>Natural particle-number entanglement resides between spatial modes in coherent ultracold atomic gases. However, operations on the modes are restricted by a superselection rule that forbids coherent superpositions of different particle numbers. This seemingly prevents mode entanglement being used as ...<br/>[Phys. Rev. Lett. 103, 200502] Published Wed Nov 11, 2009 Libby Heaney and Vlatko Vedral 2009-11-11T00:00:00-05:00 Personal use only, all commercial or other reuse prohibited 10.1103/PhysRevLett.103.200502 Phys. Rev. Lett. 103, 200502 text/html article Physical Review Letters 103 20 2009-11-11T00:00:00-05:00 200502 General Physics: Statistical and Quantum Mechanics, Quantum Information, etc. General Physics: Statistical and Quantum Mechanics, Quantum Information, etc. http://link.aps.org/doi/10.1103/PhysRevLett.103.200501 Author(s): Xun-Li Feng, Chunfeng Wu, Hui Sun, and C. H. Oh<br/>We introduce a new strongly driven dispersive atom-cavity interaction and develop a new scheme for implementing the nontrivial entangling gates for two logical qubits in decoherence-free subspaces (DFSs). Our scheme combines the robust advantages of DFS and the geometric phase. Moreover, only two ne...<br/>[Phys. Rev. Lett. 103, 200501] Published Tue Nov 10, 2009 Xun-Li Feng, Chunfeng Wu, Hui Sun, and C. H. Oh 2009-11-10T00:00:00-05:00 Personal use only, all commercial or other reuse prohibited 10.1103/PhysRevLett.103.200501 Phys. Rev. Lett. 103, 200501 text/html article Physical Review Letters 103 20 2009-11-10T00:00:00-05:00 200501 General Physics: Statistical and Quantum Mechanics, Quantum Information, etc. General Physics: Statistical and Quantum Mechanics, Quantum Information, etc. http://link.aps.org/doi/10.1103/PhysRevLett.103.200402 Author(s): Y. N. Martinez de Escobar, P. G. Mickelson, M. Yan, B. J. DeSalvo, S. B. Nagel, and T. C. Killian<br/>We report Bose-Einstein condensation of ^{84} Sr in an optical dipole trap. Efficient laser cooling on the narrow intercombination line and an ideal s-wave scattering length allow the creation of large condensates (N_{0} ∼3×10^{5} ) even though the natural abundance of this isotope is only 0.6%. ...<br/><img src="http://prola.aps.org/graphics/prlsugg30x30.gif" width="30" height="30" alt="PRL Editors' Suggestion"/><br/>[Phys. Rev. Lett. 103, 200402] Published Mon Nov 09, 2009 Y. N. Martinez de Escobar, P. G. Mickelson, M. Yan, B. J. DeSalvo, S. B. Nagel, and T. C. Killian 2009-11-09T00:00:00-05:00 Personal use only, all commercial or other reuse prohibited 10.1103/PhysRevLett.103.200402 Phys. Rev. Lett. 103, 200402 text/html article Physical Review Letters 103 20 2009-11-09T00:00:00-05:00 200402 General Physics: Statistical and Quantum Mechanics, Quantum Information, etc. General Physics: Statistical and Quantum Mechanics, Quantum Information, etc. http://link.aps.org/doi/10.1103/PhysRevLett.103.200401 Author(s): Simon Stellmer, Meng Khoon Tey, Bo Huang, Rudolf Grimm, and Florian Schreck<br/>We report on the attainment of Bose-Einstein condensation with ultracold strontium atoms. We use the ^{84} Sr isotope, which has a low natural abundance but offers excellent scattering properties for evaporative cooling. Accumulation in a metastable state using a magnetic-trap, narrowline cooling, a...<br/><img src="http://prola.aps.org/graphics/prlsugg30x30.gif" width="30" height="30" alt="PRL Editors' Suggestion"/><br/>[Phys. Rev. Lett. 103, 200401] Published Mon Nov 09, 2009 Simon Stellmer, Meng Khoon Tey, Bo Huang, Rudolf Grimm, and Florian Schreck 2009-11-09T00:00:00-05:00 Personal use only, all commercial or other reuse prohibited 10.1103/PhysRevLett.103.200401 Phys. Rev. Lett. 103, 200401 text/html article Physical Review Letters 103 20 2009-11-09T00:00:00-05:00 200401 General Physics: Statistical and Quantum Mechanics, Quantum Information, etc. General Physics: Statistical and Quantum Mechanics, Quantum Information, etc. http://link.aps.org/doi/10.1103/PhysRevLett.103.190401 Author(s): Uttam Shrestha, Juha Javanainen, and Janne Ruostekoski<br/>We study numerically the outcome of the phase separation instability of a dual-species Bose-Einstein condensate in an optical lattice. When only one excitation mode is unstable a bound pair of bright and dark solitonlike structures periodically appears and disappears, whereas for more than one unsta...<br/>[Phys. Rev. Lett. 103, 190401] Published Fri Nov 06, 2009 Uttam Shrestha, Juha Javanainen, and Janne Ruostekoski 2009-11-06T00:00:00-05:00 Personal use only, all commercial or other reuse prohibited 10.1103/PhysRevLett.103.190401 Phys. Rev. Lett. 103, 190401 text/html article Physical Review Letters 103 19 2009-11-06T00:00:00-05:00 190401 General Physics: Statistical and Quantum Mechanics, Quantum Information, etc. General Physics: Statistical and Quantum Mechanics, Quantum Information, etc. http://link.aps.org/doi/10.1103/PhysRevLett.103.190201 Author(s): Lior Turgeman, Shai Carmi, and Eli Barkai<br/>We derive backward and forward fractional Feynman-Kac equations for the distribution of functionals of the path of a particle undergoing anomalous diffusion. Fractional substantial derivatives introduced by Friedrich and co-workers [Phys. Rev. Lett. 96, 230601 (2006)] provide the correct fractional ...<br/>[Phys. Rev. Lett. 103, 190201] Published Fri Nov 06, 2009 Lior Turgeman, Shai Carmi, and Eli Barkai 2009-11-06T00:00:00-05:00 Personal use only, all commercial or other reuse prohibited 10.1103/PhysRevLett.103.190201 Phys. Rev. Lett. 103, 190201 text/html article Physical Review Letters 103 19 2009-11-06T00:00:00-05:00 190201 General Physics: Statistical and Quantum Mechanics, Quantum Information, etc. General Physics: Statistical and Quantum Mechanics, Quantum Information, etc. http://link.aps.org/doi/10.1103/PhysRevLett.103.190601 Author(s): Hichem Dammak, Yann Chalopin, Marine Laroche, Marc Hayoun, and Jean-Jacques Greffet<br/>Molecular dynamics (MD) is a numerical simulation technique based on classical mechanics. It has been taken for granted that its use is limited to a large temperature regime where classical statistics is valid. To overcome this limitation, the authors introduce in a universal way a quantum thermal b...<br/>[Phys. Rev. Lett. 103, 190601] Published Thu Nov 05, 2009 Hichem Dammak, Yann Chalopin, Marine Laroche, Marc Hayoun, and Jean-Jacques Greffet 2009-11-05T00:00:00-05:00 Personal use only, all commercial or other reuse prohibited 10.1103/PhysRevLett.103.190601 Phys. Rev. Lett. 103, 190601 text/html article Physical Review Letters 103 19 2009-11-05T00:00:00-05:00 190601 General Physics: Statistical and Quantum Mechanics, Quantum Information, etc. General Physics: Statistical and Quantum Mechanics, Quantum Information, etc. http://link.aps.org/doi/10.1103/PhysRevLett.103.180602 Author(s): Marcin Magdziarz, Aleksander Weron, Krzysztof Burnecki, and Joseph Klafter<br/>Fractional Brownian motion with Hurst index less then 1/2 and continuous-time random walk with heavy tailed waiting times (and the corresponding fractional Fokker-Planck equation) are two different processes that lead to a subdiffusive behavior widespread in complex systems. We propose a simple test...<br/>[Phys. Rev. Lett. 103, 180602] Published Fri Oct 30, 2009 Marcin Magdziarz, Aleksander Weron, Krzysztof Burnecki, and Joseph Klafter 2009-10-30T00:00:00-04:00 Personal use only, all commercial or other reuse prohibited 10.1103/PhysRevLett.103.180602 Phys. Rev. Lett. 103, 180602 text/html article Physical Review Letters 103 18 2009-10-30T00:00:00-04:00 180602 General Physics: Statistical and Quantum Mechanics, Quantum Information, etc. General Physics: Statistical and Quantum Mechanics, Quantum Information, etc. http://link.aps.org/doi/10.1103/PhysRevLett.103.180402 Author(s): Q. Y. He, E. G. Cavalcanti, M. D. Reid, and P. D. Drummond<br/>We show that arbitrary functions of continuous variables, e.g., position and momentum, can be used to generate tests that distinguish quantum theory from local hidden variable theories. By optimizing these functions, we obtain more robust violations of local causality than obtained previously. We an...<br/>[Phys. Rev. Lett. 103, 180402] Published Thu Oct 29, 2009 Q. Y. He, E. G. Cavalcanti, M. D. Reid, and P. D. Drummond 2009-10-29T00:00:00-04:00 Personal use only, all commercial or other reuse prohibited 10.1103/PhysRevLett.103.180402 Phys. Rev. Lett. 103, 180402 text/html article Physical Review Letters 103 18 2009-10-29T00:00:00-04:00 180402 General Physics: Statistical and Quantum Mechanics, Quantum Information, etc. General Physics: Statistical and Quantum Mechanics, Quantum Information, etc. http://link.aps.org/doi/10.1103/PhysRevLett.103.180401 Author(s): Steven Johnston<br/>The Feynman propagator for a free bosonic scalar field on the discrete spacetime of a causal set is presented. The formalism includes scalar field operators and a vacuum state which define a scalar quantum field theory on a causal set. This work can be viewed as a novel regularization of quantum fie...<br/>[Phys. Rev. Lett. 103, 180401] Published Thu Oct 29, 2009 Steven Johnston 2009-10-29T00:00:00-04:00 Personal use only, all commercial or other reuse prohibited 10.1103/PhysRevLett.103.180401 Phys. Rev. Lett. 103, 180401 text/html article Physical Review Letters 103 18 2009-10-29T00:00:00-04:00 180401 General Physics: Statistical and Quantum Mechanics, Quantum Information, etc. General Physics: Statistical and Quantum Mechanics, Quantum Information, etc. http://link.aps.org/doi/10.1103/PhysRevLett.103.180801 Author(s): W. Yashiro, Y. Takeda, A. Takeuchi, Y. Suzuki, and A. Momose<br/>Novel hard x-ray phase imaging microscopy that simply uses an objective and a transmission grating is described. The microscope generated an image that exhibited twin features of a sample with an opposite phase contrast having a separation of a specific distance. Furthermore, the twin features were ...<br/>[Phys. Rev. Lett. 103, 180801] Published Wed Oct 28, 2009 W. Yashiro, Y. Takeda, A. Takeuchi, Y. Suzuki, and A. Momose 2009-10-28T00:00:00-04:00 Personal use only, all commercial or other reuse prohibited 10.1103/PhysRevLett.103.180801 Phys. Rev. Lett. 103, 180801 text/html article Physical Review Letters 103 18 2009-10-28T00:00:00-04:00 180801 General Physics: Statistical and Quantum Mechanics, Quantum Information, etc. General Physics: Statistical and Quantum Mechanics, Quantum Information, etc. http://link.aps.org/doi/10.1103/PhysRevLett.103.180601 Author(s): G. C. Fadda, D. Lairez, and G. Zalczer<br/>Voltage-clamp measurements on lipid bilayers at the onset of peptide attacks before pore formation are reported. With four different peptides [alamethicin, melittin, and two synthetic peptides of the leucine (L)–lysine(K) copolymers (LK series)], correlations of conductivity fluctuations slowly de...<br/>[Phys. Rev. Lett. 103, 180601] Published Tue Oct 27, 2009 G. C. Fadda, D. Lairez, and G. Zalczer 2009-10-27T00:00:00-04:00 Personal use only, all commercial or other reuse prohibited 10.1103/PhysRevLett.103.180601 Phys. Rev. Lett. 103, 180601 text/html article Physical Review Letters 103 18 2009-10-27T00:00:00-04:00 180601 General Physics: Statistical and Quantum Mechanics, Quantum Information, etc. General Physics: Statistical and Quantum Mechanics, Quantum Information, etc. http://link.aps.org/doi/10.1103/PhysRevLett.103.170504 Author(s): Wim van Dam and Mark Howard<br/>We study how much noise can be tolerated by a universal gate set before it loses its quantum-computational power. Specifically we look at circuits with perfect stabilizer operations in addition to imperfect nonstabilizer gates. We prove that for all unitary single-qubit gates there exists a tight de...<br/>[Phys. Rev. Lett. 103, 170504] Published Fri Oct 23, 2009 Wim van Dam and Mark Howard 2009-10-23T00:00:00-04:00 Personal use only, all commercial or other reuse prohibited 10.1103/PhysRevLett.103.170504 Phys. Rev. Lett. 103, 170504 text/html article Physical Review Letters 103 17 2009-10-23T00:00:00-04:00 170504 General Physics: Statistical and Quantum Mechanics, Quantum Information, etc. General Physics: Statistical and Quantum Mechanics, Quantum Information, etc. http://link.aps.org/doi/10.1103/PhysRevLett.103.170404 Author(s): J. Ruostekoski, C. J. Foot, and A. B. Deb<br/>We propose a method of using off-resonant light scattering to measure the temperature of fermionic atoms tightly confined in a two-dimensional optical-lattice potential. We show that fluctuations of the intensity in the far-field diffraction pattern arising from thermal correlations of the atoms can...<br/>[Phys. Rev. Lett. 103, 170404] Published Fri Oct 23, 2009 J. Ruostekoski, C. J. Foot, and A. B. Deb 2009-10-23T00:00:00-04:00 Personal use only, all commercial or other reuse prohibited 10.1103/PhysRevLett.103.170404 Phys. Rev. Lett. 103, 170404 text/html article Physical Review Letters 103 17 2009-10-23T00:00:00-04:00 170404 General Physics: Statistical and Quantum Mechanics, Quantum Information, etc. General Physics: Statistical and Quantum Mechanics, Quantum Information, etc. http://link.aps.org/doi/10.1103/PhysRevLett.103.170601 Author(s): Ludovic Berthier and Gilles Tarjus<br/>We study the role of the attractive intermolecular forces in the viscous regime of a simple glass-forming liquid by using computer simulations. To this end, we compare the structure and the dynamics of a standard Lennard-Jones glass-forming liquid model with and without the attractive tail of the in...<br/>[Phys. Rev. Lett. 103, 170601] Published Thu Oct 22, 2009 Ludovic Berthier and Gilles Tarjus 2009-10-22T00:00:00-04:00 Personal use only, all commercial or other reuse prohibited 10.1103/PhysRevLett.103.170601 Phys. Rev. Lett. 103, 170601 text/html article Physical Review Letters 103 17 2009-10-22T00:00:00-04:00 170601 General Physics: Statistical and Quantum Mechanics, Quantum Information, etc. General Physics: Statistical and Quantum Mechanics, Quantum Information, etc. http://link.aps.org/doi/10.1103/PhysRevLett.103.170503 Author(s): Kai Wen, Kiyoshi Tamaki, and Yoshihisa Yamamoto<br/>In this Letter, we prove the unconditional security of the single-photon differential phase shift quantum key distribution (DPS-QKD) protocol, based on the conversion to an equivalent entanglement-based protocol. We estimate the upper bound of the phase error rate from the bit error rate, and show t...<br/>[Phys. Rev. Lett. 103, 170503] Published Thu Oct 22, 2009 Kai Wen, Kiyoshi Tamaki, and Yoshihisa Yamamoto 2009-10-22T00:00:00-04:00 Personal use only, all commercial or other reuse prohibited 10.1103/PhysRevLett.103.170503 Phys. Rev. Lett. 103, 170503 text/html article Physical Review Letters 103 17 2009-10-22T00:00:00-04:00 170503 General Physics: Statistical and Quantum Mechanics, Quantum Information, etc. General Physics: Statistical and Quantum Mechanics, Quantum Information, etc. http://link.aps.org/doi/10.1103/PhysRevLett.103.170403 Author(s): A. Di Piazza, E. Lötstedt, A. I. Milstein, and C. H. Keitel<br/>Tunneling electron-positron pair production is studied in a new setup in which a strong low-frequency and a weak high-frequency laser field propagate in the same direction and collide head-on with a relativistic nucleus. The electron-positron pair-production rate is calculated analytically in the li...<br/>[Phys. Rev. Lett. 103, 170403] Published Thu Oct 22, 2009 A. Di Piazza, E. Lötstedt, A. I. Milstein, and C. H. Keitel 2009-10-22T00:00:00-04:00 Personal use only, all commercial or other reuse prohibited 10.1103/PhysRevLett.103.170403 Phys. Rev. Lett. 103, 170403 text/html article Physical Review Letters 103 17 2009-10-22T00:00:00-04:00 170403 General Physics: Statistical and Quantum Mechanics, Quantum Information, etc. General Physics: Statistical and Quantum Mechanics, Quantum Information, etc. http://link.aps.org/doi/10.1103/PhysRevLett.103.170502 Author(s): Charles H. Bennett, Debbie Leung, Graeme Smith, and John A. Smolin<br/>We study the power of closed timelike curves (CTCs) and other nonlinear extensions of quantum mechanics for distinguishing nonorthogonal states and speeding up hard computations. If a CTC-assisted computer is presented with a labeled mixture of states to be distinguished—the most natural formulati...<br/>[Phys. Rev. Lett. 103, 170502] Published Wed Oct 21, 2009 Charles H. Bennett, Debbie Leung, Graeme Smith, and John A. Smolin 2009-10-21T00:00:00-04:00 Personal use only, all commercial or other reuse prohibited 10.1103/PhysRevLett.103.170502 Phys. Rev. Lett. 103, 170502 text/html article Physical Review Letters 103 17 2009-10-21T00:00:00-04:00 170502 General Physics: Statistical and Quantum Mechanics, Quantum Information, etc. General Physics: Statistical and Quantum Mechanics, Quantum Information, etc. http://link.aps.org/doi/10.1103/PhysRevLett.103.170402 Author(s): S. Nascimbène, N. Navon, K. J. Jiang, L. Tarruell, M. Teichmann, J. McKeever, F. Chevy, and C. Salomon<br/>We investigate the low-lying compression modes of a unitary Fermi gas with imbalanced spin populations. For low polarization, the strong coupling between the two spin components leads to a hydrodynamic behavior of the cloud. For large population imbalance we observe a decoupling of the oscillations ...<br/>[Phys. Rev. Lett. 103, 170402] Published Tue Oct 20, 2009 S. Nascimbène, N. Navon, K. J. Jiang, L. Tarruell, M. Teichmann, J. McKeever, F. Chevy, and C. Salomon 2009-10-20T00:00:00-04:00 Personal use only, all commercial or other reuse prohibited 10.1103/PhysRevLett.103.170402 Phys. Rev. Lett. 103, 170402 text/html article Physical Review Letters 103 17 2009-10-20T00:00:00-04:00 170402 General Physics: Statistical and Quantum Mechanics, Quantum Information, etc. General Physics: Statistical and Quantum Mechanics, Quantum Information, etc. http://link.aps.org/doi/10.1103/PhysRevLett.103.170501 Author(s): David Schwandt, Fabien Alet, and Sylvain Capponi<br/>When a system undergoes a quantum phase transition, the ground-state wave function shows a change of nature, which can be monitored using the fidelity concept. We introduce two quantum Monte Carlo schemes that allow the computation of fidelity and its susceptibility for large interacting many-body ...<br/>[Phys. Rev. Lett. 103, 170501] Published Mon Oct 19, 2009 David Schwandt, Fabien Alet, and Sylvain Capponi 2009-10-19T00:00:00-04:00 Personal use only, all commercial or other reuse prohibited 10.1103/PhysRevLett.103.170501 Phys. Rev. Lett. 103, 170501 text/html article Physical Review Letters 103 17 2009-10-19T00:00:00-04:00 170501 General Physics: Statistical and Quantum Mechanics, Quantum Information, etc. General Physics: Statistical and Quantum Mechanics, Quantum Information, etc. http://link.aps.org/doi/10.1103/PhysRevLett.103.170401 Author(s): R. A. Duine and H. T. C. Stoof<br/>We show how time-dependent magnetic fields lead to spin motive forces and spin drag in a spinor Bose gas. We propose to observe these effects in a toroidal trap and analyze this particular proposal in some detail. In the linear-response regime we define a transport coefficient that is analogous to t...<br/><img src="http://prola.aps.org/graphics/prlsugg30x30.gif" width="30" height="30" alt="PRL Editors' Suggestion"/><br/>[Phys. Rev. Lett. 103, 170401] Published Mon Oct 19, 2009 R. A. Duine and H. T. C. Stoof 2009-10-19T00:00:00-04:00 Personal use only, all commercial or other reuse prohibited 10.1103/PhysRevLett.103.170401 Phys. Rev. Lett. 103, 170401 text/html article Physical Review Letters 103 17 2009-10-19T00:00:00-04:00 170401 General Physics: Statistical and Quantum Mechanics, Quantum Information, etc. General Physics: Statistical and Quantum Mechanics, Quantum Information, etc.