http://pra.aps.org/ Accepted Papers for Physical Review A en-us Copyright (c) 2009 The American Physical Society 2009-11-07T07:05:02-05:00 assocpub@aps.org rss@aps.org hourly 4 2009-11-07T07:05:02-05:00 rss@aps.org http://pra.aps.org/accepted/A/b907eN5fU3c14e0b141f0ff51689e76353a67f92f We study the field generated in the outer space by the superposition of modes of a regular circular monomode fiber array. It is shown that a supermode of the fiber array generates a discrete optical vortex; the formula for the topological charge of the vortex is obtained depending on the order of th... C. N. Alexeyev, A. V. Volyar and M. A. Yavorsky 2009-11-06T00:00:00-05:00 Personal use only, all commercial or other reuse prohibited article Physical Review A Quantum optics, physics of lasers, nonlinear optics, classical optics Quantum optics, physics of lasers, nonlinear optics, classical optics http://pra.aps.org/accepted/A/6607aN30Tcb1af04565e5102febf585f4cd8d61da We derive a generalized Gross-Pitaevskii density-functional equation appropriate to study the Bose-Einstein condensate (BEC) of dimers formed of singlet spin-half Fermi pairs in the BEC-unitarity crossover while the dimer-dimer scattering length a changes from 0 to . Using an effective one-dimension... S. K. Adhikari, Hon Lug and Han Pu 2009-11-06T00:00:00-05:00 Personal use only, all commercial or other reuse prohibited article Physical Review A Matter waves and collective properties of cold atoms and molecules Matter waves and collective properties of cold atoms and molecules http://pra.aps.org/accepted/L/1407eYb1L541531c600a06340fb3604a358f45445 We report a prolonged coherence time of the collective spin wave of a thermal 87Rb atomic ensemble in a paraffin coated cell. The spin wave is prepared through a stimulated Raman process. The long coherence time is achieved by prolonging the lifetime of the spins with paraffin coating and minimize d... Shuo Jiang, XiaoMing Luo, LiQing Chen, Po Ning, Shuai Chen, JingYang Wang, ZhiPing Zhong and JianWei Pan 2009-11-06T00:00:00-05:00 Personal use only, all commercial or other reuse prohibited article Physical Review A Quantum information Quantum information http://pra.aps.org/accepted/A/d507aN3fS8a14004e59c85d2c7189b2b9e0bf250f Three-body recombination in helium-helium-alkali collisions at cold temperatures is studied using the adiabatic hyperspherical representation. The rates for the three-body recombination processes 4He+4He+X4He+4HeX and 4He+4He+X4He2+X, with X=7Li, 23Na, 39K, 85Rb and 133Cs, are calculated at nonzero ... Hiroya Suno and B. D. Esry 2009-11-06T00:00:00-05:00 Personal use only, all commercial or other reuse prohibited article Physical Review A Atomic and molecular collisions and interactions Atomic and molecular collisions and interactions http://pra.aps.org/accepted/A/f807eN3cT3712f00e56c3e15ca5538f2234db7b15 A characteristic dependence of the proton-induced 2s subshell ionization cross-section generated by the nodal structure of the 2s wave function was probed via high-resolution measurements of the L Beta 3 (L1-M3) and L Beta 6 (L3-N1) x-ray lines of Ag. The intensity ratio of the measured lines depend... M. Kavcic and Z. Smit 2009-11-06T00:00:00-05:00 Personal use only, all commercial or other reuse prohibited article Physical Review A Atomic and molecular collisions and interactions Atomic and molecular collisions and interactions http://pra.aps.org/accepted/L/ab07cY78T5314f28493861b0260888ff7ca8537bf We report our experimental observations of spatial shift and splitting of four-wave mixing (FWM) signal beams induced by additional dressing laser beams. These effects are caused by the enhanced cross-Kerr nonlinearity due to atomic coherence in a two-level atomic system. The spatial separation and ... Yanpeng Zhang, Cuicui Zuo, Huaibin Zheng, Cha Lingbiao, Zhiqiang Nie, Jianping Song, Hong Chang and Min Xiao 2009-11-06T00:00:00-05:00 Personal use only, all commercial or other reuse prohibited article Physical Review A Quantum optics, physics of lasers, nonlinear optics, classical optics Quantum optics, physics of lasers, nonlinear optics, classical optics http://pra.aps.org/accepted/L/e0071Y89W461481107e82c94769e139cfeae81263 We show the existence of a permanent molecular planar alignment in field-free conditions. We present different control strategies using shaped laser pulses to reach this state. The strategies are robust with respect to the temperature and can be implemented with the state of the art technology. They... M. Lapert, E. Hertz, S. Guerin and D. Sugny 2009-11-06T00:00:00-05:00 Personal use only, all commercial or other reuse prohibited article Physical Review A Atomic and molecular processes in external fields Atomic and molecular processes in external fields http://pra.aps.org/accepted/L/4207cY0aT801f320e1f06981ffb4ad7f6b4e9dc8f We report experimental observation of slow/fast light in configuration of counter-propagating saturating and probe waves in erbium-doped fibers with saturable absorption. The delayed/accelerated probe light propagation is shown to be associated with two-wave mixing between these two waves via dynami... Serguei Stepanov and Marcos Plata Sanchez 2009-11-06T00:00:00-05:00 Personal use only, all commercial or other reuse prohibited article Physical Review A Quantum optics, physics of lasers, nonlinear optics, classical optics Quantum optics, physics of lasers, nonlinear optics, classical optics http://pra.aps.org/accepted/A/da070N51W141010ac4f323f33668e11978637bfba This paper reports improved reconstruction of complex wavefields from extended objects. The combination of ptychography with Fresnel diffractive imaging results in better reconstructions with fewer iterations required to convergence than either method considered separately. The method is applied to ... D. J. Vine, G. J. Williams, B. Abbey, M. A. Pfeifer, J. N. Clark, M.D de Jonge., I. McNulty, A. G. Peele and K. A. Nugent 2009-11-06T00:00:00-05:00 Personal use only, all commercial or other reuse prohibited article Physical Review A Quantum optics, physics of lasers, nonlinear optics, classical optics Quantum optics, physics of lasers, nonlinear optics, classical optics http://pra.aps.org/accepted/A/69073Nf5Q3611a0cc49f54a5a369a08ef7ddc4015 We present a calculation of the spectral functions and the associated rf response of ultracold fermionic atoms near a Feshbach resonance. The single particle spectra are peaked at energies that can be modeled by a modified BCS dispersion. However, even at very low temperatures their width is compara... R. Haussmann, M. Punk and W. Zwerger 2009-11-06T00:00:00-05:00 Personal use only, all commercial or other reuse prohibited article Physical Review A Matter waves and collective properties of cold atoms and molecules Matter waves and collective properties of cold atoms and molecules http://pra.aps.org/accepted/L/e407fY47Ofd1cb2d759839182e589f4e9f77cdbb9 We demonstrate experimentally the efficient fusion neutron generation from Coulomb explosion (CE) of laser irradiated large-size heteronuclear deuterated methane clusters. A conversion efficiency of 2.1×106 neutrons per joule of incident laser energy is obtained with a 120-mJ, 70-fs laser puls... H.Y Lu., J. S. Liu, C. Wang, W. T. Wang, Z. L. Zhou, A. H. Deng, C. Q. Xia, Y. Xu, X.M Lu., Y. H. Jiang, Y. X. Leng, X. Y. Liang, G.Q Ni., R.X Li. and Z.Z Xu. 2009-11-06T00:00:00-05:00 Personal use only, all commercial or other reuse prohibited article Physical Review A Clusters (including fullerenes) Clusters (including fullerenes) http://pra.aps.org/accepted/L/a407cY50Qad1bf24a5552ab6611d52d1977b270f0 Arbitrary exponentially large unitaries cannot be implemented efficiently by quantum circuits. However, we show that quantum circuits can efficiently implement any unitary provided it has at most polynomially many nonzero entries in any row or column, and these entries are efficiently computable. On... Stephen P. Jordan and Pawel Wocjan 2009-11-06T00:00:00-05:00 Personal use only, all commercial or other reuse prohibited article Physical Review A Quantum information Quantum information http://pra.aps.org/accepted/L/81075Y88Nd61a220745d46831a09ad7a08e55f181 The pi-phase shift between |F=1, mF=0> and |F=2, mF=0> states for an adiabatic rotation of a magnetic field observed in Ramsey atom interferometry arises from the negative sign of the transition amplitude between the |1, 0> and |2, 0> states when the wave functions are rotated to the opposite direction.... Atsushi Takahashi, Hiromitsu Imai, Kazuya Numazaki and Atsuo Morinaga 2009-11-06T00:00:00-05:00 Personal use only, all commercial or other reuse prohibited article Physical Review A Fundamental concepts Fundamental concepts http://pra.aps.org/accepted/L/9e079Y9fQb21822c94db0096fbb9aee8bd1512ed0 We develop a geometric approach to quantify the capability of creating entanglement for a general physical interaction acting on two qubits. We use the entanglement measure proposed by us for N-qubit pure states (Phys. Rev. A 77, 062334 (2008)). This geo- metric method has the distinct advantage tha... Behzad Lari, Ali Saif M. Hassan and Pramod S. Joag 2009-11-06T00:00:00-05:00 Personal use only, all commercial or other reuse prohibited article Physical Review A Quantum information Quantum information http://pra.aps.org/accepted/A/0c07bN68Wfe1de02062114d194ab3fa10c25e5049 Equilibrium mean charge states have been measured for 3 - 7 MeV lithium, boron, and carbon ions passing through thin carbon foils. The data are compared to the predictions of several semi-empirical models of charge equilibrium in the less than or equal 1MeV/u regime. The current work underscores the... Chris Schmitt, Jay La Verne, Daniel Robertson, Matthew Bowers, Wen Luting and Philippe Collon 2009-11-06T00:00:00-05:00 Personal use only, all commercial or other reuse prohibited article Physical Review A Atomic and molecular collisions and interactions Atomic and molecular collisions and interactions http://pra.aps.org/accepted/A/d9071N3eU701790ed31a93c6f5c7084b0f146e03e We present a novel approach to calculating strong field ionization dynamics of multielectron molecular targets. Adopting a multielectron wavefunction ansatz based on field-free ab initio neutral and ionic multielectron states, a set of coupled time-dependent single-particle Schrödinger equation... Michael Spanner and Serguei Patchkovskii 2009-11-06T00:00:00-05:00 Personal use only, all commercial or other reuse prohibited article Physical Review A 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://pra.aps.org/accepted/A/0907dN9fT4f1910295d81a79ad8a5fd08af06d2cd We present the full evaluation of a cold atom gyroscope based on atom interferometry. We have performed extensive studies to determine the systematic errors, scale factor and sensitivity. We demonstrate that the acceleration noise can be efficiently removed from the rotation signal, allowing us to r... A. Gauguet, B. Canuel, T. Leveque, W. Chaibi and A. Landragin 2009-11-05T00:00:00-05:00 Personal use only, all commercial or other reuse prohibited article Physical Review A Matter waves and collective properties of cold atoms and molecules Matter waves and collective properties of cold atoms and molecules http://pra.aps.org/accepted/A/f707dNe4Q521660ea4254e8491b2c0c2b09cf6990 Entanglement swapping between photon pairs is a fundamental building block in schemes using quantum relays or quantum repeaters to overcome the range limits of long distance quantum key distribution. We develop a closed-form solution for the actual quantum states prepared by realistic entanglement s... Artur Scherer, Gina Howard, Barry C. Sanders and Wolfgang Tittel 2009-11-05T00:00:00-05:00 Personal use only, all commercial or other reuse prohibited article Physical Review A Quantum information Quantum information http://pra.aps.org/accepted/A/86079N78Ted1f503960f1194f253c0278e9f8257f Spatial qudit states can be realized by using multi-slits to discretize the transverse momentum of a photon. The merit of this kind of spatial qudit states is that the implementation of higher dimensional qudits is relatively easy. As we have recently shown, the quantum states of these spatial qudit... Gen Taguchi, Tatsuo Dougakiuchi, Masataka Iinuma, Holger F. Hofmann and Yutaka Kadoya 2009-11-05T00:00:00-05:00 Personal use only, all commercial or other reuse prohibited article Physical Review A Fundamental concepts Fundamental concepts http://pra.aps.org/accepted/A/f207dN4dUea18109d4f97fa5fb70ff83ea7dca5ea We have carried out a detailed and systematic study of the correlation energies of inert gas atoms Ne, Ar, Kr and Xe using relativistic many-body perturbation theory and relativistic coupled-cluster theory. In the relativistic coupled-cluster calculations, we implement perturbative triples and inclu... B. K. Mani, K. V. P. Latha and D. Angom 2009-11-05T00:00:00-05:00 Personal use only, all commercial or other reuse prohibited article Physical Review A Atomic and molecular structure and dynamics Atomic and molecular structure and dynamics http://pra.aps.org/accepted/A/6e07eN78W361c50424ad8094003e3e2e67ac6face The electron dynamics in p - He and He2+ - He collisions have been investigated on the level of the independent electron model by using the two-center basis generator method. Projectile angular-differential cross sections for various one- and two-electron processes involving elec... Myroslav Zapukhlyak and Tom Kirchner 2009-11-05T00:00:00-05:00 Personal use only, all commercial or other reuse prohibited article Physical Review A Atomic and molecular collisions and interactions Atomic and molecular collisions and interactions http://pra.aps.org/accepted/B/6a07aO5dTee1151c927954b898c07bfcd20d3b0e1 We generalize the recently proposed Greenberger-Horne-Zeilinger (GHZ) tripartite protocol [A. Galiautdinov, J. M. Martinis, Phys. Rev. A 78, 010305(R) (2008)] to fully connected networks of weakly coupled qubits interacting by way of anisotropic Heisenberg exchange g(XX+YY)+[g\tilde]ZZ. Our model ad... Andrei Galiautdinov, Mark W. Coffey and Ron Deiotte 2009-11-05T00:00:00-05:00 Personal use only, all commercial or other reuse prohibited article Physical Review A Quantum information Quantum information http://pra.aps.org/accepted/L/05077Y43Sa01fc246298155349b720339bfc63d7a Within an adiabatic approximation to the three-body Coulomb system, we study the strength of the leading order conformaly invariant attractive dipole interaction produced when a slow charged particle q3 (with mass m3) is captured by the first excited state of a dimer [with individual masses and char... A. Delfino, T. Frederico and Lauro Tomio 2009-11-05T00:00:00-05:00 Personal use only, all commercial or other reuse prohibited article Physical Review A Atomic and molecular structure and dynamics Atomic and molecular structure and dynamics http://pra.aps.org/accepted/A/8a076N9bQ8f17f07457c18e69ae4c21f06a29ac29 We report improved precision measurements of the Van der Waals potential strength (C3) for Na atoms and a silicon-nitride (SiNx) surface. We studied diffraction from nano-fabricated gratings with a particular "magic" open-fraction that allows us to determine C3 without the need for separate measurem... Vincent P. A. Lonij, William F. Holmgren and Alexander D. Cronin 2009-11-05T00:00:00-05:00 Personal use only, all commercial or other reuse prohibited article Physical Review A Photon, electron, atom, and molecule interactions with solids and surfaces Photon, electron, atom, and molecule interactions with solids and surfaces http://pra.aps.org/accepted/A/d1071N2dW0d17d07048620a248a50aa46f4ad7ead The pressure broadening and shift rates for the cesium D1 (62P1/2 62S1/2) transition with the noble gases and N2, H2, HD, D2, CH4, C2H6, CF4 and 3He were obtained for pressures less than 300 torr at temperatures under 65C by means of laser absorption spectroscopy. The collisional broadening rate, gL... Greg A. Pitz, Douglas E. Wertepny and Glen P. Perram 2009-11-05T00:00:00-05:00 Personal use only, all commercial or other reuse prohibited article Physical Review A Atomic and molecular collisions and interactions Atomic and molecular collisions and interactions