http://pra.aps.org/ Recent articles in Physical Review A en-us Copyright (c) 2008 The American Physical Society 2008-05-14T18:15:05-04:00 assocpub@aps.org rss@aps.org hourly 4 2008-05-14T18:15:05-04:00 rss@aps.org http://link.aps.org/doi/10.1103/PhysRevA.77.059901 Author(s): P. H. Mokler, J. R. Crespo López-Urrutia, F. J. Currell, N. Nakamura, S. Ohtani, C. J. Osborne, H. Tawara, J. Ullrich, and H. Watanabe<br/>[Phys. Rev. A 77, 059901] Published Wed May 14, 2008 P. H. Mokler, J. R. Crespo López-Urrutia, F. J. Currell, N. Nakamura, S. Ohtani, C. J. Osborne, H. Tawara, J. Ullrich, and H. Watanabe 2008-05-14T00:00:00-04:00 Personal use only, all commercial or other reuse prohibited 10.1103/PhysRevA.77.059901 Phys. Rev. A 77, 059901 text/html article Physical Review A 77 5 2008-05-14T00:00:00-04:00 059901 ERRATA ERRATA http://link.aps.org/doi/10.1103/PhysRevA.77.053811 Author(s): Hayato Goto and Kouichi Ichimura<br/>The Dicke model generalized to the case where the dependence of the coupling constant on individual atoms is taken into account is investigated. It is shown that the generalized Dicke model exhibits a quantum phase transition from the normal phase to the superradiant phase in the thermodynamic limit...<br/>[Phys. Rev. A 77, 053811] Published Wed May 14, 2008 Hayato Goto and Kouichi Ichimura 2008-05-14T00:00:00-04:00 Personal use only, all commercial or other reuse prohibited 10.1103/PhysRevA.77.053811 Phys. Rev. A 77, 053811 text/html article Physical Review A 77 5 2008-05-14T00:00:00-04:00 053811 Quantum optics, physics of lasers, nonlinear optics, classical optics Quantum optics, physics of lasers, nonlinear optics, classical optics http://link.aps.org/doi/10.1103/PhysRevA.77.052707 Author(s): A. K. Bhatia<br/>The hybrid theory of electron-hydrogen elastic scattering [Phys. Rev. A 75, 032713 (2007)] is applied to the S -wave scattering of electrons from He^{+} and Li^{2+} . In this method, both short-range and long-range correlations are included in the Schrödinger equation at the same time. Phase shifts...<br/>[Phys. Rev. A 77, 052707] Published Wed May 14, 2008 A. K. Bhatia 2008-05-14T00:00:00-04:00 Personal use only, all commercial or other reuse prohibited 10.1103/PhysRevA.77.052707 Phys. Rev. A 77, 052707 text/html article Physical Review A 77 5 2008-05-14T00:00:00-04:00 052707 Atomic and molecular collisions and interactions Atomic and molecular collisions and interactions http://link.aps.org/doi/10.1103/PhysRevA.77.052315 Author(s): Eric Chi, Stephen A. Lyon, and Margaret Martonosi<br/>Quantum computers (QCs) must implement quantum error correcting codes (QECCs) to protect their logical qubits from errors, and modeling the effectiveness of QECCs on QCs is an important problem for evaluating the QC architecture. The previously developed Monte Carlo (MC) error models may take days o...<br/>[Phys. Rev. A 77, 052315] Published Wed May 14, 2008 Eric Chi, Stephen A. Lyon, and Margaret Martonosi 2008-05-14T00:00:00-04:00 Personal use only, all commercial or other reuse prohibited 10.1103/PhysRevA.77.052315 Phys. Rev. A 77, 052315 text/html article Physical Review A 77 5 2008-05-14T00:00:00-04:00 052315 Quantum information Quantum information http://link.aps.org/doi/10.1103/PhysRevA.77.052111 Author(s): Anne E. B. Nielsen and Klaus Mølmer<br/>We present a detailed derivation of the stochastic master equation determining the time evolution of the state of a general quantum system, which is placed inside a cavity and subjected to indirect measurements by monitoring the state of electromagnetic radiation transmitted through the cavity. The ...<br/>[Phys. Rev. A 77, 052111] Published Wed May 14, 2008 Anne E. B. Nielsen and Klaus Mølmer 2008-05-14T00:00:00-04:00 Personal use only, all commercial or other reuse prohibited 10.1103/PhysRevA.77.052111 Phys. Rev. A 77, 052111 text/html article Physical Review A 77 5 2008-05-14T00:00:00-04:00 052111 Fundamental concepts Fundamental concepts http://link.aps.org/doi/10.1103/PhysRevA.77.053607 Author(s): Qi Zhang, Peter Hänggi, and Jiangbin Gong<br/>A two-mode Bose-Einstein condensate coupled by a high-frequency modulation field is found to display rich features. An effective stationary Hamiltonian approach reveals the emergence of additional degenerate eigenstates as well as additional topological structures of the spectrum. Possible applicati...<br/>[Phys. Rev. A 77, 053607] Published Tue May 13, 2008 Qi Zhang, Peter Hänggi, and Jiangbin Gong 2008-05-13T00:00:00-04:00 Personal use only, all commercial or other reuse prohibited 10.1103/PhysRevA.77.053607 Phys. Rev. A 77, 053607 text/html article Physical Review A 77 5 2008-05-13T00:00:00-04:00 053607 Matter waves Matter waves http://link.aps.org/doi/10.1103/PhysRevA.77.053403 Author(s): Paul Jameson and Arsen Khvedelidze<br/>The classical dynamics of a charged particle traveling in a laser field modeled by an elliptically polarized monochromatic electromagnetic plane wave is discussed within the time reparametrization invariant form of the nonrelativistic Hamilton-Jacobi theory. The exact parametric representation for a...<br/>[Phys. Rev. A 77, 053403] Published Tue May 13, 2008 Paul Jameson and Arsen Khvedelidze 2008-05-13T00:00:00-04:00 Personal use only, all commercial or other reuse prohibited 10.1103/PhysRevA.77.053403 Phys. Rev. A 77, 053403 text/html article Physical Review A 77 5 2008-05-13T00:00:00-04:00 053403 Atomic and molecular processes in external fields, including interactions with strong fields and short pulses Atomic and molecular processes in external fields, including interactions with strong fields and short pulses http://link.aps.org/doi/10.1103/PhysRevA.77.052314 Author(s): Tomasz M. Kott and David Collins<br/>We compare pseudopure state ensemble implementations, quantified by their initial polarization and ensemble size, of Grover’s search algorithm to probabilistic classical sequential search algorithms in terms of their success and failure probabilities. We propose a criterion for quantifying the res...<br/>[Phys. Rev. A 77, 052314] Published Tue May 13, 2008 Tomasz M. Kott and David Collins 2008-05-13T00:00:00-04:00 Personal use only, all commercial or other reuse prohibited 10.1103/PhysRevA.77.052314 Phys. Rev. A 77, 052314 text/html article Physical Review A 77 5 2008-05-13T00:00:00-04:00 052314 Quantum information Quantum information http://link.aps.org/doi/10.1103/PhysRevA.77.052313 Author(s): Christian Weedbrook, Nicolai B. Grosse, Thomas Symul, Ping Koy Lam, and Timothy C. Ralph<br/>We consider the quantum cloning of continuous variable entangled states. This is achieved by introducing two symmetric entanglement cloning machines (or e -cloners): a local e -cloner and a global e -cloner; where we look at the preservation of entanglement in the clones under the condition that the...<br/>[Phys. Rev. A 77, 052313] Published Tue May 13, 2008 Christian Weedbrook, Nicolai B. Grosse, Thomas Symul, Ping Koy Lam, and Timothy C. Ralph 2008-05-13T00:00:00-04:00 Personal use only, all commercial or other reuse prohibited 10.1103/PhysRevA.77.052313 Phys. Rev. A 77, 052313 text/html article Physical Review A 77 5 2008-05-13T00:00:00-04:00 052313 Quantum information Quantum information http://link.aps.org/doi/10.1103/PhysRevA.77.052110 Author(s): F. A. Bovino and I. P. Degiovanni<br/>Violation of modified Wigner inequality in a binary bipartite quantum system allows the discrimination between the quantum world and the classical local-realistic one, and also ensures the security of Ekert-type quantum key distribution protocol. In this paper we study both theoretically and experim...<br/>[Phys. Rev. A 77, 052110] Published Tue May 13, 2008 F. A. Bovino and I. P. Degiovanni 2008-05-13T00:00:00-04:00 Personal use only, all commercial or other reuse prohibited 10.1103/PhysRevA.77.052110 Phys. Rev. A 77, 052110 text/html article Physical Review A 77 5 2008-05-13T00:00:00-04:00 052110 Fundamental concepts Fundamental concepts http://link.aps.org/doi/10.1103/PhysRevA.77.051802 Author(s): Yaroslav V. Kartashov, Victor A. Vysloukh, and Lluis Torner<br/>We reveal fundamental analogies between soliton dynamics in light-induced random photonic lattices and Brownian motion of particles. In particular, we discover that the average squared soliton displacement increases linearly with distance after an initial ballistic regime of propagation. We also fin...<br/><img src="http://prola.aps.org/graphics/rapid30x30.gif" width="30" height="30" alt="Rapid Communication"/><br/>[Phys. Rev. A 77, 051802] Published Tue May 13, 2008 Yaroslav V. Kartashov, Victor A. Vysloukh, and Lluis Torner 2008-05-13T00:00:00-04:00 Personal use only, all commercial or other reuse prohibited 10.1103/PhysRevA.77.051802 Phys. Rev. A 77, 051802 text/html article Physical Review A 77 5 2008-05-13T00:00:00-04:00 051802 Quantum optics, physics of lasers, nonlinear optics, classical optics Quantum optics, physics of lasers, nonlinear optics, classical optics http://link.aps.org/doi/10.1103/PhysRevA.77.051402 Author(s): P. F. Griffin, E. Riis, and A. S. Arnold<br/>We propose and numerically investigate a scalable ring trap for cold atoms that surmounts problems of roughness of the potential and end effects of trap wires. A stable trapping potential is formed about an electrically isolated, conducting loop in an ac magnetic field by time averaging the superpos...<br/><img src="http://prola.aps.org/graphics/rapid30x30.gif" width="30" height="30" alt="Rapid Communication"/><br/>[Phys. Rev. A 77, 051402] Published Tue May 13, 2008 P. F. Griffin, E. Riis, and A. S. Arnold 2008-05-13T00:00:00-04:00 Personal use only, all commercial or other reuse prohibited 10.1103/PhysRevA.77.051402 Phys. Rev. A 77, 051402 text/html article Physical Review A 77 5 2008-05-13T00:00:00-04:00 051402 Atomic and molecular processes in external fields, including interactions with strong fields and short pulses Atomic and molecular processes in external fields, including interactions with strong fields and short pulses http://link.aps.org/doi/10.1103/PhysRevA.77.053810 Author(s): A. M. Nugrowati, S. F. Pereira, and A. S. van de Nes<br/>We present a systematic study of the transmitted field of an ultrashort pulse through Young’s double slit. We show how the spatial-temporal distribution of the field in the near and intermediate zone is affected by the input polarization state of the pulse. The analysis has been separated to study...<br/>[Phys. Rev. A 77, 053810] Published Mon May 12, 2008 A. M. Nugrowati, S. F. Pereira, and A. S. van de Nes 2008-05-12T00:00:00-04:00 Personal use only, all commercial or other reuse prohibited 10.1103/PhysRevA.77.053810 Phys. Rev. A 77, 053810 text/html article Physical Review A 77 5 2008-05-12T00:00:00-04:00 053810 Quantum optics, physics of lasers, nonlinear optics, classical optics Quantum optics, physics of lasers, nonlinear optics, classical optics http://link.aps.org/doi/10.1103/PhysRevA.77.053809 Author(s): J. Alnis, A. Matveev, N. Kolachevsky, Th. Udem, and T. W. Hänsch<br/>We achieved a 0.5 Hz optical beat note linewidth with ∼0.1 Hz/s frequency drift at 972 nm between two external cavity diode lasers independently stabilized to two vertically mounted Fabry-Pérot (FP) reference cavities with a finesse of 400 000. Vertical FP reference cavities are suspended in ...<br/>[Phys. Rev. A 77, 053809] Published Mon May 12, 2008 J. Alnis, A. Matveev, N. Kolachevsky, Th. Udem, and T. W. Hänsch 2008-05-12T00:00:00-04:00 Personal use only, all commercial or other reuse prohibited 10.1103/PhysRevA.77.053809 Phys. Rev. A 77, 053809 text/html article Physical Review A 77 5 2008-05-12T00:00:00-04:00 053809 Quantum optics, physics of lasers, nonlinear optics, classical optics Quantum optics, physics of lasers, nonlinear optics, classical optics http://link.aps.org/doi/10.1103/PhysRevA.77.053606 Author(s): Gennadiy Burlak and Boris A. Malomed<br/>By means of the variational approximation (VA) and systematic simulations, we study dynamics and stability boundaries for solitons in a two-dimensional (2D) self-attracting Bose-Einstein condensate (BEC), trapped in an optical lattice (OL) whose amplitude is subjected to periodic time modulation (th...<br/>[Phys. Rev. A 77, 053606] Published Mon May 12, 2008 Gennadiy Burlak and Boris A. Malomed 2008-05-12T00:00:00-04:00 Personal use only, all commercial or other reuse prohibited 10.1103/PhysRevA.77.053606 Phys. Rev. A 77, 053606 text/html article Physical Review A 77 5 2008-05-12T00:00:00-04:00 053606 Matter waves Matter waves http://link.aps.org/doi/10.1103/PhysRevA.77.053402 Author(s): Javier Madroñero and Andreas Buchleitner<br/>We present a method for the accurate quantum treatment of the planar three-body Coulomb problem under electromagnetic driving. Our ab initio approach combines Floquet theory, complex dilation, and the representation of the Hamiltonian in suitably chosen coordinates, without adjustable parameters. Th...<br/>[Phys. Rev. A 77, 053402] Published Mon May 12, 2008 Javier Madroñero and Andreas Buchleitner 2008-05-12T00:00:00-04:00 Personal use only, all commercial or other reuse prohibited 10.1103/PhysRevA.77.053402 Phys. Rev. A 77, 053402 text/html article Physical Review A 77 5 2008-05-12T00:00:00-04:00 053402 Atomic and molecular processes in external fields, including interactions with strong fields and short pulses Atomic and molecular processes in external fields, including interactions with strong fields and short pulses http://link.aps.org/doi/10.1103/PhysRevA.77.052312 Author(s): Seunghwa Ryu, Wei Cai, and Alfredo Caro<br/>We develop a fast algorithm to calculate the entanglement of formation of a mixed state, which is defined as the minimum average entanglement of the pure states that form the mixed state. The algorithm combines conjugat-gradient and steepest-descent algorithms and outperforms both. Using this new al...<br/>[Phys. Rev. A 77, 052312] Published Mon May 12, 2008 Seunghwa Ryu, Wei Cai, and Alfredo Caro 2008-05-12T00:00:00-04:00 Personal use only, all commercial or other reuse prohibited 10.1103/PhysRevA.77.052312 Phys. Rev. A 77, 052312 text/html article Physical Review A 77 5 2008-05-12T00:00:00-04:00 052312 Quantum information Quantum information http://link.aps.org/doi/10.1103/PhysRevA.77.052109 Author(s): Wenxin Ding, Nicholas E. Bonesteel, and Kun Yang<br/>In this paper we calculate the block entanglement entropies of spin models whose ground states have perfect antiferromagnetic or ferromagnetic long-range order. In the latter case the definition of entanglement entropy is extended to properly take into account the ground state degeneracy. We find in...<br/>[Phys. Rev. A 77, 052109] Published Mon May 12, 2008 Wenxin Ding, Nicholas E. Bonesteel, and Kun Yang 2008-05-12T00:00:00-04:00 Personal use only, all commercial or other reuse prohibited 10.1103/PhysRevA.77.052109 Phys. Rev. A 77, 052109 text/html article Physical Review A 77 5 2008-05-12T00:00:00-04:00 052109 Fundamental concepts Fundamental concepts http://link.aps.org/doi/10.1103/PhysRevA.77.051401 Author(s): Edvardas Narevicius, Adam Libson, Christian G. Parthey, Isaac Chavez, Julia Narevicius, Uzi Even, and Mark G. Raizen<br/>We report the stopping of a molecular oxygen beam, using a series of pulsed electromagnetic coils. A series of coils is fired in a timed sequence to bring the molecules to near rest, where they are detected with a quadrupole mass spectrometer. Applications to cold chemistry are discussed.<br/><img src="http://prola.aps.org/graphics/rapid30x30.gif" width="30" height="30" alt="Rapid Communication"/><br/>[Phys. Rev. A 77, 051401] Published Mon May 12, 2008 Edvardas Narevicius, Adam Libson, Christian G. Parthey, Isaac Chavez, Julia Narevicius, Uzi Even, and Mark G. Raizen 2008-05-12T00:00:00-04:00 Personal use only, all commercial or other reuse prohibited 10.1103/PhysRevA.77.051401 Phys. Rev. A 77, 051401 text/html article Physical Review A 77 5 2008-05-12T00:00:00-04:00 051401 Atomic and molecular processes in external fields, including interactions with strong fields and short pulses Atomic and molecular processes in external fields, including interactions with strong fields and short pulses http://link.aps.org/doi/10.1103/PhysRevA.77.050304 Author(s): Frederick W. Strauch, Mark Edwards, Eite Tiesinga, Carl Williams, and Charles W. Clark<br/>We propose a two-qubit phase gate for ultracold atoms in a tilted double-well optical lattice. Such a lattice is capable of confining pairs of atoms in a two-dimensional array of double-well potentials where both the barrier height and the energy difference of the minima of the two wells (known as t...<br/><img src="http://prola.aps.org/graphics/rapid30x30.gif" width="30" height="30" alt="Rapid Communication"/><br/>[Phys. Rev. A 77, 050304] Published Mon May 12, 2008 Frederick W. Strauch, Mark Edwards, Eite Tiesinga, Carl Williams, and Charles W. Clark 2008-05-12T00:00:00-04:00 Personal use only, all commercial or other reuse prohibited 10.1103/PhysRevA.77.050304 Phys. Rev. A 77, 050304 text/html article Physical Review A 77 5 2008-05-12T00:00:00-04:00 050304 Quantum information Quantum information http://link.aps.org/doi/10.1103/PhysRevA.77.053808 Author(s): Dong Wang, Tony Hansson, Åsa Larson, Hans O. Karlsson, and Jonas Larson<br/>We apply wave-packet methods to study an ion-trap system imposing neither the rotating wave nor the Lamb-Dicke approximations. By this approach we show the existence of states with restricted phase-space evolution as a genuine consequence of quantum interference between wave-packet fractions. A part...<br/>[Phys. Rev. A 77, 053808] Published Fri May 09, 2008 Dong Wang, Tony Hansson, Åsa Larson, Hans O. Karlsson, and Jonas Larson 2008-05-09T00:00:00-04:00 Personal use only, all commercial or other reuse prohibited 10.1103/PhysRevA.77.053808 Phys. Rev. A 77, 053808 text/html article Physical Review A 77 5 2008-05-09T00:00:00-04:00 053808 Quantum optics, physics of lasers, nonlinear optics, classical optics Quantum optics, physics of lasers, nonlinear optics, classical optics http://link.aps.org/doi/10.1103/PhysRevA.77.053605 Author(s): D. B. M. Dickerscheid, Y. Kawaguchi, and M. Ueda<br/>We present a theory of spinor superfluidity in a two-species heteronuclear ultracold fermionic atomic gas consisting of arbitrary half-integer spin and spin one-half atoms. In particular, we focus on the magnetism of the superfluid phase and determine the possible phases in the absence of a magnetic...<br/>[Phys. Rev. A 77, 053605] Published Fri May 09, 2008 D. B. M. Dickerscheid, Y. Kawaguchi, and M. Ueda 2008-05-09T00:00:00-04:00 Personal use only, all commercial or other reuse prohibited 10.1103/PhysRevA.77.053605 Phys. Rev. A 77, 053605 text/html article Physical Review A 77 5 2008-05-09T00:00:00-04:00 053605 Matter waves Matter waves http://link.aps.org/doi/10.1103/PhysRevA.77.053604 Author(s): A. Keleş, S. Sevinçli, and B. Tanatar<br/>We study the ground-state properties of a Bose-Einstein condensate with short-range repulsion and gravitylike 1/r interatomic attraction in two-dimensions (2D). Using the variational approach we obtain the ground-state energy and analyze the stability of the condensate for a range of interaction str...<br/>[Phys. Rev. A 77, 053604] Published Fri May 09, 2008 A. Keleş, S. Sevinçli, and B. Tanatar 2008-05-09T00:00:00-04:00 Personal use only, all commercial or other reuse prohibited 10.1103/PhysRevA.77.053604 Phys. Rev. A 77, 053604 text/html article Physical Review A 77 5 2008-05-09T00:00:00-04:00 053604 Matter waves Matter waves http://link.aps.org/doi/10.1103/PhysRevA.77.052311 Author(s): P. W. Lamberti, A. P. Majtey, A. Borras, M. Casas, and A. Plastino<br/>In a recent paper, the generalization of the Jensen-Shannon divergence in the context of quantum theory has been studied [Majtey , Phys. Rev. A 72, 052310 (2005)]. This distance between quantum states has shown to verify several of the properties required for a good distinguishability measure. Here ...<br/>[Phys. Rev. A 77, 052311] Published Fri May 09, 2008 P. W. Lamberti, A. P. Majtey, A. Borras, M. Casas, and A. Plastino 2008-05-09T00:00:00-04:00 Personal use only, all commercial or other reuse prohibited 10.1103/PhysRevA.77.052311 Phys. Rev. A 77, 052311 text/html article Physical Review A 77 5 2008-05-09T00:00:00-04:00 052311 Quantum information Quantum information http://link.aps.org/doi/10.1103/PhysRevA.77.052108 Author(s): G. M. D’Ariano, P. Perinotti, and M. F. Sacchi<br/>We introduce the quantum indirect estimation theory, which provides a general framework to address the problem of which ensemble averages can be estimated by means of an available set of measuring apparatuses, e.g., estimating the ensemble average of an observable by measuring other observables. A m...<br/>[Phys. Rev. A 77, 052108] Published Fri May 09, 2008 G. M. D’Ariano, P. Perinotti, and M. F. Sacchi 2008-05-09T00:00:00-04:00 Personal use only, all commercial or other reuse prohibited 10.1103/PhysRevA.77.052108 Phys. Rev. A 77, 052108 text/html article Physical Review A 77 5 2008-05-09T00:00:00-04:00 052108 Fundamental concepts Fundamental concepts http://link.aps.org/doi/10.1103/PhysRevA.77.050701 Author(s): T. J. M. Zouros, B. Sulik, L. Gulyás, and K. Tökési<br/>A mechanism for the selective population of 1s2s2p ^{4} P _{J} states by electron capture in energetic collisions of F^{7+} (1s2s ^{3} S) ions with H_{2} and He is elucidated. Capture calculations indicate (1s2s ^{3} S)nl ^{2,4} L doublet and quartet levels to be approximately evenly populated for n...<br/><img src="http://prola.aps.org/graphics/rapid30x30.gif" width="30" height="30" alt="Rapid Communication"/><br/>[Phys. Rev. A 77, 050701] Published Fri May 09, 2008 T. J. M. Zouros, B. Sulik, L. Gulyás, and K. Tökési 2008-05-09T00:00:00-04:00 Personal use only, all commercial or other reuse prohibited 10.1103/PhysRevA.77.050701 Phys. Rev. A 77, 050701 text/html article Physical Review A 77 5 2008-05-09T00:00:00-04:00 050701 Atomic and molecular collisions and interactions Atomic and molecular collisions and interactions http://link.aps.org/doi/10.1103/PhysRevA.77.054701 Author(s): E. Surdutovich, G. Setzler, W. E. Kauppila, S. J. Rehse, and T. S. Stein<br/>We present measurements of total cross sections for 1 to 30 eV positrons scattered by uracil molecules. The measurements are done using a beam transmission technique on a setup adjusted to accommodate the nature of uracil and we discuss possibilities of future experiments studying positron interacti...<br/>[Phys. Rev. A 77, 054701] Published Thu May 08, 2008 E. Surdutovich, G. Setzler, W. E. Kauppila, S. J. Rehse, and T. S. Stein 2008-05-08T00:00:00-04:00 Personal use only, all commercial or other reuse prohibited 10.1103/PhysRevA.77.054701 Phys. Rev. A 77, 054701 text/html article Physical Review A 77 5 2008-05-08T00:00:00-04:00 054701 Atomic and molecular collisions and interactions Atomic and molecular collisions and interactions http://link.aps.org/doi/10.1103/PhysRevA.77.054301 Author(s): Zbigniew Ficek and Ryszard Tanaś<br/>The concept of time delayed creation of entanglement by the dissipative process of spontaneous emission is investigated. A threshold effect for the creation of entanglement is found where the initially unentangled qubits can be entangled after a finite time despite the fact that the coherence betwee...<br/>[Phys. Rev. A 77, 054301] Published Thu May 08, 2008 Zbigniew Ficek and Ryszard Tanaś 2008-05-08T00:00:00-04:00 Personal use only, all commercial or other reuse prohibited 10.1103/PhysRevA.77.054301 Phys. Rev. A 77, 054301 text/html article Physical Review A 77 5 2008-05-08T00:00:00-04:00 054301 Quantum information Quantum information http://link.aps.org/doi/10.1103/PhysRevA.77.053807 Author(s): E. Brambilla, L. Caspani, O. Jedrkiewicz, L. A. Lugiato, and A. Gatti<br/>Twin entangled beams produced by single-pass parametric down-conversion (PDC) offer the opportunity to detect weak amount of absorption with an improved sensitivity with respect to standard techniques which make use of classical light sources. We propose a differential measurement scheme which explo...<br/>[Phys. Rev. A 77, 053807] Published Thu May 08, 2008 E. Brambilla, L. Caspani, O. Jedrkiewicz, L. A. Lugiato, and A. Gatti 2008-05-08T00:00:00-04:00 Personal use only, all commercial or other reuse prohibited 10.1103/PhysRevA.77.053807 Phys. Rev. A 77, 053807 text/html article Physical Review A 77 5 2008-05-08T00:00:00-04:00 053807 Quantum optics, physics of lasers, nonlinear optics, classical optics Quantum optics, physics of lasers, nonlinear optics, classical optics http://link.aps.org/doi/10.1103/PhysRevA.77.053806 Author(s): Ai-Jun Li, Xiao-Li Song, Xiao-Gang Wei, Lei Wang, and Jin-Yue Gao<br/>The effect of spontaneously generated coherence (SGC) on spontaneous emission and dynamical evolution of a microwave-driven four-level atomic system is studied. Interesting phenomena due to SGC, such as spectral-line narrowing, spectra-line enhancement, spectral-line suppression, and fluorescence qu...<br/>[Phys. Rev. A 77, 053806] Published Thu May 08, 2008 Ai-Jun Li, Xiao-Li Song, Xiao-Gang Wei, Lei Wang, and Jin-Yue Gao 2008-05-08T00:00:00-04:00 Personal use only, all commercial or other reuse prohibited 10.1103/PhysRevA.77.053806 Phys. Rev. A 77, 053806 text/html article Physical Review A 77 5 2008-05-08T00:00:00-04:00 053806 Quantum optics, physics of lasers, nonlinear optics, classical optics Quantum optics, physics of lasers, nonlinear optics, classical optics