Showing papers in "Annals of Physics in 2012"

TL;DR: In this paper, a general framework for non-abelian symmetries is presented for matrix-product and tensor-network states in the presence of well-defined orthonormal local as well as effective basis sets.

TL;DR: In this paper, a general theory of a boson decomposition for both local and non-local interactions in lattice fermion models is developed, which allows us to describe fermionic degrees of freedom and collective charge and spin excitations on equal footing.

TL;DR: In this article, self-similar rogue wave solutions (rational solutions) of the inhomogeneous nonlinear Schrodinger equation (NLSE) via a similarity transformation connected with the standard NLSE are presented.

TL;DR: In this article, the Lamb shift in muonic deuterium and helium has been analyzed and compared with other work, and some previously neglected (but very small) effects are included.

TL;DR: In this article, the authors developed a new systematic approach to generate solvable rational extensions of primary translationally shape invariant potentials, which are built on the excited states Riccati-Schrodinger functions regularized via specific discrete symmetries of the considered potential.

TL;DR: In this paper, the authors studied the dynamics of nonclassical correlations by exactly solving a model consisting of two atomic qubits with spontaneous emission, and they found that the non-classical correlation defined by different measures give different qualitative characterizations of those correlations.

TL;DR: In this paper, the authors present a general treatment of reciprocity, discusses important examples, shows applications in the field of photon (Mossbauer) scattering, and establishes a fruitful connection with a recently developing area of mathematics.

TL;DR: In this paper, it was shown that the low energy electron excitations of the curved graphene sheet Σ are solutions of the massless Dirac equation on a 2 + 1 dimensional ultra-static metric on R × Σ.

TL;DR: In this article, the authors propose the entropic measurement-induced nonlocality (MIN) as the maximal increment of von Neumann entropy induced by the locally nondisturbing measurement, and study its behaviors in both the independent and common structured reservoirs.

TL;DR: In this paper, the bipartite entanglement in systems of N identical bosons distributed in M different modes is studied and a definition of separability not related to any a priori Hilbert space tensor product structure is given in terms of commuting subalgebras of observables.

TL;DR: The black hole information paradox forces us into a strange situation: we must find a way to break the semiclassical approximation in a domain where no quantum gravity effects would normally be expected.

TL;DR: In this paper, the authors investigated the one-and two-dimensional atom localization behaviors via spontaneous emission in a coherently driven five-level atomic system by means of a radio-frequency field driving a hyperfine transition.

TL;DR: In this paper, a quantum transport theory for describing photonic dissipative transport dynamics in nanophotonics is developed, where the photonic transport through waveguides is entirely determined from the exact master equation of the driven resonators.

TL;DR: The phase space quantum mechanics (PSQM) as mentioned in this paper is an alternative formulation of quantum mechanics known as the deformation quantization, and it is shown that the quantization naturally arises as an appropriate deformation of the classical Hamiltonian mechanics.

TL;DR: In this paper, it is shown that higher level effective laws, based on the outcomes of non-linear combinations of lower level linear interactions, will generically not be unitary; hence the applicability of quantum theory at higher levels is strictly limited.

TL;DR: In this article, the authors investigated the quantum phase transitions in the ground states of several critical systems, including transverse field Ising and XY models as well as XY with multiple spin interactions, XXZ and the collective system Lipkin-Meshkov-Glick models, by using different quantumness measures.

TL;DR: In this article, the dispersion relation of the combined object, called depleton, is a periodic function of its momentum with the period 2 π n, where n is the mean density of the liquid.

TL;DR: In this article, an effective shell-model hamiltonian based on perturbative expansion of the Q ˆ -box vertex function has been derived for the case of a non-degenerate (0 + 2 ) ħ ω model space.

TL;DR: In this article, the nonlinear propagation of planar and nonplanar (cylindrical and spherical) ion-acoustic waves in an unmagnetized electron-positron-ion-dust plasma with two-electron temperature distributions is investigated in the context of nonextensive statistics.

TL;DR: In this article, the authors investigated the dynamics of disentanglement as measured by the tripartite negativity and Bell non-locality as defined by the extent of violation of the multipartite Bell-type inequalities.

TL;DR: In this article, a formalism for finding solutions to non-Markovian open quantum system dynamics via canonical perturbation theory is presented, without making the Born −Markov or rotating wave approximations (RWA).

TL;DR: In this article, the authors analyse supersymmetric models that show supersymmetry breaking in one and two dimensions using lattice methods and show that the non-local SLAC derivative is a sensible choice in the quenched model, which is nothing but the two-dimensional ϕ 4 model.

TL;DR: In this paper, a 1-parameter family of self-adjoint extensions of the Hamiltonian for a particle confined to a finite interval with perfectly reflecting boundary conditions was derived and applied to the non-Hermitian momentum operator in a quantum dot.

TL;DR: In this paper, the authors established the connection between the generating functional for the first class theories and the generating function for the second class theories using the finite field dependent BRST (FFBRST) transformation.

TL;DR: In this paper, a unifying method based on factorization properties is introduced for finding symmetries of quantum and classical superintegrable systems using the example of the Tremblay-Turbiner-Winternitz (TTW) model.

TL;DR: In this paper, a lattice gauge theory model for graphene was introduced, which describes tight binding electrons hopping on the honeycomb lattice and interacting with a three-dimensional quantum U ( 1 ) gauge field.

TL;DR: In this article, the authors derived general results for the mass shift of bound states with angular momentum l ≥ 1 in a periodic cubic box in two and three spatial dimensions, and gave explicit expressions for this relation in the shallow binding limit.

TL;DR: In this paper, a self-consistent theoretical framework for a wide class of physical systems characterized by a finite space of states is proposed, which allows us to construct a discrete version of the Weyl-Wigner-Moyal formalism for finite-dimensional discrete phase spaces with toroidal topology.

TL;DR: In this paper, various approaches used for the calculation of optically induced forces applied to a transparent optical medium imbedded in a close plane optical resonator are analyzed, by means of analysis of a change in the eigen frequency and energy stored in the resonator at various positions of the medium.

TL;DR: In this paper, a path excitation field is introduced to represent all possible paths a particle can take via thermal path fluctuations, and the trajectories are shown to obey a no crossing rule with respect to the central line.