Showing papers in "Physics Letters A in 1982"

TL;DR: In this article, a recent proposal to achieve faster-than-light communication by means of an EPR-type experimental set-up is examined, and it is shown that such superluminal communication is not possible.

TL;DR: In this article, it was shown that the only one-particle excitation in the Heisenberg antiferromagnetic chain of arbitrary spins is a doublet of spin 12 spin waves.

TL;DR: In this article, an exact solution of the one-dimensional isotropic Heisenberg chain with arbitrary spins S is obtained, and on the basis of the exact solution the thermodynamic properties of the model with antiferromagnetic interaction are investigated.

TL;DR: In this article, an extension of linear response theory for non-canonical, classical systems is presented, which allows the design of a translationally invariant non-equilibrium simulation algorithm for calculating the thermal conductivity of dense fluids.

TL;DR: In this paper, it was shown that squeezed states of the electromagnetic field are obtained in the Jaynes-Cummings model of an atomic transition coupled to a single mode, quantized electromagnetic field.

TL;DR: In this article, the self-dual solution of the star-triangle relations in Z N models is presented, and the corresponding partition functions are calculated, where the star triangulation problem is considered.

TL;DR: In this article, the SU(2) self-dual Yang-Mills equation was shown to pass the Painleve test for complete integrability, which is the state-of-the-art result.

TL;DR: Using the Bethe-Ansatz for a spin 1 2 Kondo model, the authors calculate the specific heat numerically, and use it to calculate the heat of a spin.

TL;DR: In this paper, a coupled nonlinear wave equation is presented, and it is shown that the coupled equation possesses infinitely many symmetries and conservation laws, each of which is a hamiltonian system.

TL;DR: In this paper, the α-γ transition of Ce and its compounds is explained within a compressible Kondo lattice model where the variation of |J|/D with volume is taken into account.

TL;DR: In this paper, the time evolution of a two-level system interacting with a single-mode chaotic (or thermal) radiation field is investigated using the fully quantized Jaynes-Cummings model and results are compared with a semiclassical model.

TL;DR: In this paper, a two-parameter mathematical model for a periodically forced nonlinear oscillator is analyzed using analytical and numerical techniques, which displays phase locking, quasiperiodic dynamics, bistability, period-doubling bifurcations and chaotic dynamics.

TL;DR: A quasi-linear deterministic system arising throughout the physical sciences exhibits a family of sub-harmonic resonant peaks between which we delineate cascades of period-doubling bifurcations leading to chaotic regimes typical of a strange attractor as discussed by the authors.

TL;DR: In this paper, it was pointed out that an evolutionary system recently introduced by Hirota and Satsuma is nothing but an example of a general theory due to Drinfel'd and Sokolov.

TL;DR: In this article, two nonlocal recursion operators are given, which yield explicit formulas for infinite hierarchies of symmetry generators and conservation laws for the two-dimensional Korteweg-de Vries equation.

TL;DR: In this article, a transparent conformation space renormalization group formalism is given which can incorporate arbitrary molecular weight distributions to the theory of semi-dilute polymer solutions, and closed forms for the osmotic pressure π and the mean square end-to-end distance of a single test chain are given to order ϵ = 4− d, d being the spatial dimensionality, as functionals of the molecular weight distribution function.

TL;DR: In this article, a system of equations, a two component generalisation of the KdV equation, which Hirota and Satsuma recently conjectured to be integrable, was considered and a scattering problem was derived using the Wahlquist-Estabrook prolongation technique.

TL;DR: In this paper, a local thermodynamic criterion for the best B o r based on minimizing the free energy is proposed, which can be adapted from the hard sphere model to produce excellent results for any potential.

TL;DR: In this paper, a simple molecular field model is presented for the prediction of magnetic transition temperatures of rare-earth (RE) compounds when crystalline electric field (CEF) splittings are significant.

TL;DR: In this paper, a new model for neutral particle emission from the surface of laser-irradiated non-metallic solids is presented, which accounts for the experimental result that the energy distribution of the particles emitted from the laser-IRradiated surface is not maxwellian and deviates to higher energy than expected from the lattice temperature derived from a Raman experiment.

TL;DR: The non-periodic firing of the Onchidium giant neuron under sinusoidal stimulation was investigated in this paper, showing that state points on the attractor are mixed by the baker's transformation.

TL;DR: In this article, a renormalization group (RG) formulation of the transition to chaotic behavior via intermittency in one-dimesional maps is presented, and the known scaling behavior of the length of the laminar regions in the presence of external noise is obtained from the leading relevant eigenvalues of the RG transformation.

TL;DR: In this article, Backlund transformations of a reciprocal type are developed for a broad class of conservation laws and a permutability diagram for the generation of solutions is presented, which may be used to generate auto-Backlund transformations for reciprocally associated nonlinear evolution equations.

TL;DR: In this paper, the early universe dissipative processes in terms of relativistic imperfect fluid formulation are discussed in the context of early universe and particle production of quantized scalar fields in an isotropically expanding space.

TL;DR: Using the Painleve criterion, three integrable cases for the Henon-Heiles system were identified in this paper, and a new integral of motion, unknown to date, was presented for the third case.

TL;DR: In this article, the Cauchy problem for the Landau-Lifschitz equation is studied by the inverse transform method and an exact N -soliton solution is constructed.

TL;DR: In this article, a simple boundary condition is suggested to ensure regularity in a hydrodynamical model of a bounded plasma, and the generalized Bohm criterion for a collisional sheath is obtained.

TL;DR: An analytical equation for the electronic stopping of ions in solids for non-relativistic velocities, that has no adjustable parameters, is obtained in a semi-phenomenological manner.

TL;DR: In this article, the importance of generalized quantum measurements in quantum optics and precision measurements is indicated, and an uncertainty relation more stringent than the usual one is derived for these measurements is derived, which can often be interpreted as approximate simultaneous measurements of noncommuting observables.

TL;DR: In this paper, it is shown that the similarity solutions of the Boussinesq equation satisfy the first or second Painleveequation, and the soliton solution satisfies the second or third one.