Electronic entanglement via quantum Hall interferometry in analogy to an optical method
Diego Frustaglia and Adan Cabello
We present an interferometric scheme producing orbital entanglement in a quantum Hall system upon electron-hole pair emission via tunneling. The proposed setup is an electronic version of the optical interferometer proposed by Cabello et al. [Phys. Rev. Lett. 102, 040401 (2009)] and is feasible with ... [Phys. Rev. B 80, 201312 (2009)] published Fri Nov 20, 2009.
Localization-delocalization transitions in a two-dimensional quantum percolation model: von Neumann entropy studies
Longyan Gong and Peiqing Tong
In two-dimensional quantum site-percolation square lattice models, the von Neumann entropy is extensively studied numerically. At a certain eigenenergy, the localization-delocalization transition is reflected by the derivative of von Neumann entropy which is maximal at the quantum percolation thresh ... [Phys. Rev. B 80, 174205 (2009)] published Fri Nov 20, 2009.
Correlated two-photon emission by transitions of Dirac-Volkov states in intense laser fields: QED predictions
Erik Lotstedt and Ulrich D. Jentschura
In an intense laser field, an electron may decay by emitting a pair of photons. The two photons emitted during the process, which can be interpreted as a laser-dressed double Compton scattering, remain entangled in a quantifiable way: namely, the so-called concurrence of the photon polarizations giv ... [Phys. Rev. A 80, 053419 (2009)] published Fri Nov 20, 2009.
Field-free permanent molecular planar alignment
M. Lapert, E. Hertz, S. Guerin, and D. Sugny
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 ... [Phys. Rev. A 80, 051403 (2009)] published Fri Nov 20, 2009.
Ground-state properties of a one-dimensional strongly interacting Bose-Fermi mixture in a double-well potential
K. Lelas, D. Jukic, and H. Buljan
We calculate the reduced single-particle density matrix (RSPDM), momentum distribution, natural orbitals and their occupancies, for a strongly repulsive one-dimensional Bose-Fermi mixture in a double-well potential with a large central barrier. We assume that all particles have the same mass, and fe ... [Phys. Rev. A 80, 053617 (2009)] published Thu Nov 19, 2009.
Interaction-induced dynamical phase locking of Bose-Einstein condensates
Erez Boukobza, Doron Cohen, and Amichay Vardi
We show that interactions result in the emergence of a definite relative phase between two initially incoherent Bose-Einstein condensates. The many-realization interference fringe visibility is universal at g~1/3 throughout the Josephson interaction regime as evident from a semiclassical picture. Ot ... [Phys. Rev. A 80, 053619 (2009)] published Thu Nov 19, 2009.
Single-particle density matrix for a time-dependent strongly interacting one-dimensional Bose gas
R. Pezer, T. Gasenzer, and H. Buljan
We derive a 1/c expansion for the single-particle density matrix of a strongly interacting time-dependent one-dimensional Bose gas, described by the Lieb-Liniger model (c denotes the strength of the interaction). The formalism is derived by expanding Gaudin's Fermi-Bose mapping operator up to 1/c te ... [Phys. Rev. A 80, 053616 (2009)] published Thu Nov 19, 2009.
Spin susceptibility of degenerate quark matter
Kausik Pal and Abhee K. Dutt-Mazumder
The expression for spin susceptibility chi of degenerate quark matter is derived with corrections up to [script O](gln g). It is shown that, at low density, chi changes sign and turns negative, indicating a ferromagnetic phase transition. To this order, we also calculate sound velocity c and incomp ... [Phys. Rev. C 80, 054911 (2009)] published Thu Nov 19, 2009.
Dynamical Origin of the Effective Storage Capacity in the Brain's Working Memory
Christian Bick and Mikhail I. Rabinovich
The capacity of working memory (WM), a short-term buffer for information in the brain, is limited. We suggest a model for sequential WM that is based upon winnerless competition amongst representations of available informational items. Analytical results for the underlying mathematical model relate ... [Phys. Rev. Lett. 103, 218101 (2009)] published Thu Nov 19, 2009.
State tomography of a qubit through scattering of a probe qubit
Antonella De Pasquale, Kazuya Yuasa, and Hiromichi Nakazato
We discuss the state tomography of a fixed qubit (a spin-1/2 target particle), which is in general in a mixed state, through one-dimensional scattering of a probe qubit off the target. Two strategies are presented by making use of different degrees of freedom of the probe, i.e. spin and momentum. Re ... [Phys. Rev. A 80, 052111 (2009)] published Wed Nov 18, 2009.
Sound control by temperature gradients
Jose Sanchez-Dehesa, Mitko I. Angelov, Francisco Cervera, and Liang-Wu Cai
This work reports experiments showing that airborne sound propagation can be controlled by temperature gradients. A system of two heated tubes is here used to demonstrate the collimation and focusing of an ultrasonic beam by the refractive index profile created by the temperature gradients existing ... [Appl. Phys. Lett. 95, 204102 (2009)] published Wed Nov 18, 2009.
Dynamically generated open-charm baryons beyond the zero-range approximation
C. E. Jimenez-Tejero, A. Ramos, and I. Vidana
The interaction of the low-lying pseudoscalar mesons with the ground-state baryons in the charm sector is studied within a coupled-channel approach using a t-channel vector-exchange driving force. The amplitudes describing the scattering of the pseudoscalar mesons off the ground-state baryons are ob ... [Phys. Rev. C 80, 055206 (2009)] published Wed Nov 18, 2009.
Gently Modulating Optomechanical Systems
A. Mari and J. Eisert
We introduce a framework of optomechanical systems that are driven with a mildly amplitude-modulated light field, but that are not subject to classical feedback or squeezed input light. We find that in such a system one can achieve large degrees of squeezing of a mechanical micromirrorsignifying qua ... [Phys. Rev. Lett. 103, 213603 (2009)] published Wed Nov 18, 2009.
Quantization of higher spin fields
J. W. Wagenaar and T. A. Rijken
In this article we quantize (massive) higher spin (1<=j<=2) fields by means of Dirac's constrained Hamilton procedure both in the situation were they are totally free and were they are coupled to (an) auxiliary field(s). A full constraint analysis and quantization is presented by determining and dis ... [Phys. Rev. D 80, 104027 (2009)] published Wed Nov 18, 2009.
Conductance distribution in doped and defected graphene nanoribbons
Antonino La Magna, Ioannis Deretzis, Giuseppe Forte, and Renato Pucci
Electronic transport at the [mu]m length scale is theoretically investigated for N-doped and vacancy damaged graphene nanoribbons. In these systems, localization due to scattering is strongly energy dependent, and this fact leads to the appearance of conductance quasigaps in the spectral region of t ... [Phys. Rev. B 80, 195413 (2009)] published Tue Nov 17, 2009.
Simple mechanical analogs of rapid adiabatic passage in atomic physics
B. W. Shore, M. V. Gromovyy, L. P. Yatsenko, and V. I. Romanenko
We discuss two mechanical systems in which the approximate equations of motion are the same as the rapid adiabatic passage of a two-state quantum-mechanical system, such as that which occurs with quasistatic interactions and from the quasiperiodic action of a chirped-frequency laser pulse. We discus ... [Am. J. Phys. 77, 1183 (2009)] published Tue Nov 17, 2009.
Rotational states of a benzenelike ring and Bloch's theorem
Y. C. Lee and Wei Z. Lee
The rotational states and their energies for a model of a ringlike molecule are studied. It is found that the discrete cylindrical symmetry of the molecule gives rise to a new quantum number in addition to that for the usual quantized angular momentum m. This new quantum number is formally analogous ... [Am. J. Phys. 77, 1144 (2009)] published Tue Nov 17, 2009.
Spin Manipulation Using the Light-Shift Effect in Rubidium Atoms
T. Moriyasu, D. Nomoto, Y. Koyama, Y. Fukuda, and T. Kohmoto
Optical manipulation of spin coherence in rubidium atoms is studied. The effect of off-resonant and circularly polarized light on optically induced magnetization is investigated. The change in precession frequency caused by the light-shift effect is verified. Absorption-free phase control of spin pr ... [Phys. Rev. Lett. 103, 213602 (2009)] published Tue Nov 17, 2009.
Anderson Localization of Solitons
Krzysztof Sacha, Cord A. Muller, Dominique Delande, and Jakub Zakrzewski
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 ... [Phys. Rev. Lett. 103, 210402 (2009)] published Tue Nov 17, 2009.
Asymptotically free four-Fermi theory in 4 dimensions at the z=3 Lifshitz-like fixed point
Avinash Dhar, Gautam Mandal, and Spenta R. Wadia
We show that a Nambu-Jona-Lasinio type four-fermion coupling at the z=3 Lifshitz-like fixed point in 3+1 dimensions is asymptotically free and generates a mass scale dynamically. This result is nonperturbative in the limit of a large number of fermion species. The theory is ultraviolet complete and ... [Phys. Rev. D 80, 105018 (2009)] published Tue Nov 17, 2009.
Emergence of scalar matter from spin foam model
Peng Xu and Yongge Ma
A spin foam model of three dimensional gravity nonminimally coupled with a scalar field is studied. By discretization of the scalar field, the model is worked out precisely in a purely combinational way. It is shown that the quantum physics of the scalar matter is totally encoded into the modified d ... [Phys. Rev. D 80, 104024 (2009)] published Tue Nov 17, 2009.
Quantum corrections to the Larmor radiation formula in scalar electrodynamics
A. Higuchi and P. J. Walker
We use the semiclassical approximation in perturbative scalar quantum electrodynamics to calculate the quantum correction to the Larmor radiation formula to first order in Planck's constant in the nonrelativistic approximation, choosing the initial state of the charged particle to be a momentum eige ... [Phys. Rev. D 80, 105019 (2009)] published Tue Nov 17, 2009.
Detection of protein secondary structures via the discrete wavelet transform
Jesus Pando, Luke Sands, and Sean E. Shaheen
We subject the primary sequence of proteins gathered from the Structural Classification of Proteins (SCOP) database to a discrete wavelet transform (DWT) analysis to search for predictors of secondary structures. We use proteins with both alpha helices and beta sheets (the A/B, A+B databases from SC ... [Phys. Rev. E 80, 051909 (2009)] published Mon Nov 16, 2009.
Nonequilibrium thermal entanglement in a three-qubit XX model
X. L. Huang (黄晓理), J. L. Guo (郭金良), and X. X. Yi (衣学喜)
Making use of the master equation and effective Hamiltonian approach, we investigate the steady-state entanglement in a three-qubit XX model. Both symmetric and nonsymmetric qubit-qubit couplings are considered. The system (the three qubits) is coupled to two bosonic baths at different temperatures. ... [Phys. Rev. A 80, 054301 (2009)] published Mon Nov 16, 2009.
Attraction and repulsion of parallel femtosecond filaments in air
Hua Cai, Jian Wu, Peifen Lu, Xueshi Bai, Liang'en Ding et al.
We present an approach to explore and control nonlinear interactions between two orthogonally polarized femtosecond filaments launched parallel in air. The self-phase and cross-phase modulations due to the Kerr effect and cross-(de)focusing induced by the plasma and molecular alignment were distinct ... [Phys. Rev. A 80, 051802 (2009)] published Mon Nov 16, 2009.
Some applications of the fractional Poisson probability distribution
Nick Laskin
Physical and mathematical applications of the recently invented fractional Poisson probability distribution have been presented. As a physical application, a new family of quantum coherent states has been introduced and studied. As mathematical applications, we have developed the fractional generali ... [J. Math. Phys. 50, 113513 (2009)] published Mon Nov 16, 2009.
Gauge-invariant interaction of spin-(3/2) resonances
V. Shklyar and H. Lenske
We show that the gauge-invariant coupling suggested by Pascalutsa removes non-pole terms from the spin-(3/2) propagator only for a specific choice of free parameter. For the general case, the problem can be solved by demanding the invariance of the full Lagrangian under the point-like transformation ... [Phys. Rev. C 80, 058201 (2009)] published Mon Nov 16, 2009.
Energy relaxation probed by weak antilocalization measurements in GaN heterostructures
H. Cheng, N. Biyikli, J. Xie, C. Kurdak, and H. Morkoc
Energy relaxation and electron-phonon (e-p) interaction are investigated in wurtzite AlGaN/AlN/GaN and AlInN/AlN/GaN heterostructures with polarization induced two-dimensional electron gases in the BlochGruneisen regime. Weak antilocalization (WAL) and Shubnikovde Haas measurements were performed on ... [J. Appl. Phys. 106, 103702 (2009)] published Mon Nov 16, 2009.
Quantum noncanonical field theory: Symmetries and interaction
J. M. Carmona, J. L. Cortes, J. Indurain, and D. Mazon
The symmetry properties of a proposal to go beyond relativistic quantum field theory based on a modification of the commutation relations of fields are identified. Poincare invariance in an auxiliary spacetime is found in the Lagrangian version of the path integral formulation. This invariance is co ... [Phys. Rev. D 80, 105014 (2009)] published Mon Nov 16, 2009.
O(alpha) and O(alpha) heavy flavor contributions to transversity at Q>>m
Johannes Blumlein, Sebastian Klein, and Beat Todtli
In deep-inelastic processes the heavy flavor Wilson coefficients factorize for Q>>m into the light-flavor Wilson coefficients of the corresponding process and the massive operator matrix elements (OMEs). We calculate the O(alpha) and O(alpha) massive OME for the flavor nonsinglet transversity distri ... [Phys. Rev. D 80, 094010 (2009)] published Mon Nov 16, 2009.
Measure for the Degree of Non-Markovian Behavior of Quantum Processes in Open Systems
Heinz-Peter Breuer, Elsi-Mari Laine, and Jyrki Piilo
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 ... [Phys. Rev. Lett. 103, 210401 (2009)] published Mon Nov 16, 2009.
Electromagnetic interactions between parallel dielectric-diamagnetic cylinders
K. Tatur and L. M. Woods
The interaction energy due to electromagnetic field fluctuations between two infinitely long straight parallel dielectric-diamagnetic cylinders immersed in a medium is considered. We make use of the mode summation method for the calculations. We investigate the energy dependence on the cylindrical r ... [Phys. Rev. A 80, 050101 (2009)] published Fri Nov 13, 2009.
Cavity-assisted spontaneous emission of a single three-level atom as a single-photon source. (arXiv:0911.3746v1 [quant-ph])
ePrint arXiv http://arXiv.org/
Reduced density matrix of permutational invariant many-body systems. (arXiv:0911.3777v1 [quant-ph])
ePrint arXiv http://arXiv.org/
Ancilla-Driven Universal Quantum Computation. (arXiv:0911.3783v1 [quant-ph])
ePrint arXiv http://arXiv.org/
Quantum And Relativistic Protocols For Secure Multi-Party Computation. (arXiv:0911.3814v1 [quant-ph])
ePrint arXiv http://arXiv.org/
Hybrid quantum devices and quantum engineering. (arXiv:0911.3835v1 [quant-ph])
ePrint arXiv http://arXiv.org/
Phase control of a longitudinal momentum entangled photon state by a deformable membrane mirror. (arXiv:0911.3837v1 [quant-ph])
ePrint arXiv http://arXiv.org/
Limitations of Passive Protection of Quantum Information. (arXiv:0911.3843v1 [quant-ph])
ePrint arXiv http://arXiv.org/
Magnetic Anistropy due to the Casimir Effect. (arXiv:0911.3854v1 [quant-ph])
ePrint arXiv http://arXiv.org/
Two-color photoionization of calcium using SHG and LED light. (arXiv:0911.3867v1 [quant-ph])
ePrint arXiv http://arXiv.org/
Phase Locked Photon Echoes for Near-Perfect Retrieval Efficiency and Extended Storage Time. (arXiv:0911.3869v2 [quant-ph])
ePrint arXiv http://arXiv.org/
Multiphoton ghost imaging with classical light. (arXiv:0911.3718v1 [quant-ph])
ePrint arXiv http://arXiv.org/
Experimental feedback control of quantum systems using weak measurements. (arXiv:0911.3698v1 [quant-ph])
ePrint arXiv http://arXiv.org/
Signal acquisition via polarization modulation in single photon sources. (arXiv:0911.3668v1 [quant-ph])
ePrint arXiv http://arXiv.org/
Capacitance modeling of complex topographical silicon quantum dot structures. (arXiv:0911.3670v1 [quant-ph])
ePrint arXiv http://arXiv.org/
Phase transitions and metastability in the distribution of the bipartite entanglement of a system of qubits. (arXiv:0911.3888v1 [quant-ph])
ePrint arXiv http://arXiv.org/
Beyond the Quantum Adiabatic Approximation: Adiabatic Perturbation Theory. (arXiv:0807.1363v2 [quant-ph] UPDATED)
ePrint arXiv http://arXiv.org/
Quantum cryptography using partially entangled states. (arXiv:0807.2234v2 [quant-ph] UPDATED)
ePrint arXiv http://arXiv.org/
Rashba coupling in quantum dots in the presence of magnetic field. (arXiv:0810.3394v2 [math-ph] UPDATED)
ePrint arXiv http://arXiv.org/
Quantal statistical phase factor accompanying inter-change of two electrons. (arXiv:0903.5132v132 [quant-ph] UPDATED)
ePrint arXiv http://arXiv.org/
A note on general no-cloning theorem for black boxes. (arXiv:0908.1668v2 [quant-ph] UPDATED)
ePrint arXiv http://arXiv.org/
Distinguishability Measures and Entropies for General Probabilistic Theories. (arXiv:0910.0994v3 [quant-ph] UPDATED)
ePrint arXiv http://arXiv.org/
All Optical Scheme for Strongly Enhanced Production of Dipolar Molecules in the Electro-Vibrational Ground State. (arXiv:0911.3167v1 [cond-mat.quant-gas] CROSS LISTED)
ePrint arXiv http://arXiv.org/