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Showing papers in "Physics Letters A in 1995"


Journal ArticleDOI
TL;DR: In this article, the solitary wave solutions of two types of variant Boussinesq equations were obtained by using a homogeneous balance method, and the solution was shown to be stable.

887 citations


Journal ArticleDOI
TL;DR: In this article, a measure of complexity based on a probabilistic description of physical systems is proposed, which can be applied to many physical situations and to different descriptions of a given system.

756 citations


Journal ArticleDOI
TL;DR: The necessary and sufficient condition for violating the CHSH inequality by an arbitrary mixed spin-1 2 state is presented in this paper, where some examples of mixtures which demonstrate the utility of the condition are considered.

645 citations


Journal ArticleDOI
TL;DR: In this paper, a linear analysis for a modification of the delay feedback control technique that allows one to stabilize unstable periodic orbits of a strange attractor over a large domain of parameters is presented.

417 citations


Journal ArticleDOI
TL;DR: In this article, two procedures were developed for classifying an individual system as | p > or | q >, non-orthogonal, given an ensemble with respective proportions r and 1-r.

255 citations


Journal ArticleDOI
TL;DR: In this article, the authors study Bose-Einstein condensation of relatively small numbers of particles confined by a harmonic potential and show that the specific heat capacity exhibits a sharp drop at the onset of condensation, reminiscent of the heat capacity of liquid 4 He at the λ-point.

216 citations


Journal ArticleDOI
TL;DR: In this article, it was shown that charged particulates having the same polarity can attract each other due to collective interactions involving the dust acoustic waves, which might provide the possibility of lattice formation in Coulomb systems.

208 citations


Journal ArticleDOI
TL;DR: In this paper, the entropic uncertainty relation for sets of N + 1 complementary observables A k in N -dimensional Hilbert space is sharpened to Σ k H(A k ) ≥ 1 2 N ln (1 2 N ) + ( 1 2 n + 1) ln [ 1 2 (N + 1)] for even N.

173 citations


Journal ArticleDOI
TL;DR: In this paper, a method to obtain soliton solutions to relativistic systems of coupled scalar fields is presented, which is done by examining the energy associated to static field configurations and derive a set of first-order differential equations that solve the equations of motion when the energy saturates its lower bound.

168 citations


Journal ArticleDOI
TL;DR: A variant of the method of surrogate data is applied to a single time series from an electroencephalogram (EEG) recording of a patient undergoing an epileptic seizure, a nearly periodic pattern of spike-and-wave complexes.

167 citations


Journal ArticleDOI
TL;DR: In this article, a test for the hypothesis that a time series is reversible is proposed, and it is shown that if reversibility can be rejected all static transformations of linear Gaussian random processes can be excluded as a model for the time series.

Journal ArticleDOI
TL;DR: In this article, a statistical parameter estimation theory for quantum pure state models is presented, based on symmetric logarithmic derivatives, and clarified the differences between pure-state models and strictly positive models.

Journal ArticleDOI
TL;DR: In this paper, an electronic oscillator which simulates the Mackey-glass evolution equation is designed and investigated experimentally, and the largest estimated correlation dimension for the chaotic oscillations ranges up to ≈ 7.

Journal ArticleDOI
TL;DR: In this paper, an effective potential (pseudopotential) model of the particle interaction of a classical non-ideal plasma, taking into account collective events in plasma, is proposed.

Journal ArticleDOI
TL;DR: In this paper, a classification of second-order polynomial SUSY quantum mechanics in one and two dimensions is given, with particular attention paid to the irreducible supercharges which cannot be built by repetition of ordinary Darboux transformations.

Journal ArticleDOI
TL;DR: In this paper, for many particle non-interacting gases which are in heat and particle baths, the grand canonical ensemble concept has been set out and the probability P R of the ensemble to be in the state R has been investigated for the equilibrium state, by making use of the Boltzmann H -theorem with the techniques of calculus of variations.

Journal ArticleDOI
TL;DR: In this article, the existence of exponentially localized structures in a (2+1)-dimensional breaking soliton equation is studied and a singularity structure analysis is carried out and it is shown that it admits the Painleve property for a specific parametric choice.

Journal ArticleDOI
TL;DR: In this paper, it was shown that mutual trapping of the fundamental and second-harmonic waves in a dispersive medium with quadratic nonlinearity supports a variety of solitary waves including bright and dark solitons, solitONS with trapped radiation, stable bound states of two (or more) solITons.

Journal ArticleDOI
TL;DR: The Gaussian-scaled phase-randomized Fourier transform is applied to generate surrogate data of a group of multichannel EEG time series in order to investigate nonlinearity in the EEG.

Journal ArticleDOI
TL;DR: In this article, a charged static torus-like black hole solution is constructed from the plane-symmetric solution of the Einstein-Maxwell equations with negative cosmological constant.

Journal ArticleDOI
TL;DR: In this article, X-ray diffraction patterns, Raman spectra, hardness and other physical properties were carried out for fullerite after a heat treatment up to 1830 K at 9.5 and 13 GPa nonhydrostatic pressure of bulk samples.

Journal ArticleDOI
TL;DR: A simplified class of models, called swarms, which are inspired by the collective behavior of social insects are explored, which bear a generic resemblance to a number of pattern formation processes in the physical sciences.

Journal ArticleDOI
TL;DR: In this article, the theory of isothermic surfaces in E 3 is reformulated within the modern theory of completely integrable (soliton) systems, which enables one to study the geometrical properties of isormic surfaces by means of powerful spectral methods available in the soliton theory.

Journal ArticleDOI
TL;DR: In this article, the authors report results of systematic numerical simulations of collisions between a soliton and an attractive defect described by the perturbing term in the nonlinear Schrodinger equation proportional to the δ-function.

Journal ArticleDOI
TL;DR: In this paper, a continuous feedback loop is proposed for stabilizing unstable periodic orbits of chaotic systems, where the delay is chosen to be equal to the interval between the last and the k th previous maximum of the output signal.

Journal ArticleDOI
Masuo Suzuki1
TL;DR: In this article, a hybrid fourth-order product formula for exponential product formulas is given, where the complexity of the formula is O(n 2 ) + O(x 5 ), where n is the number of vertices.

Journal ArticleDOI
TL;DR: In this paper, the authors obtained very long relaxation times T 1 of up to 120 h for the nuclear polarization of an optically pumped helium 3 gas, where the glass containers were internally coated with metallic films such as bismuth or cesium.

Journal ArticleDOI
TL;DR: In this paper, the authors report on a two-photon coincidence experiment that demonstrates the violation of local realism, as defined by Einstein, Podolsky and Rosen, by about 45 standard deviations without explicit use of Bell inequalities.

Journal ArticleDOI
TL;DR: It is suggested that ensembles of self-replicating entities such as biological systems naturally evolve to a self-organized critical state in which fluctuations, as well as waiting times between phase transitions (“epochs”), are distributed according to a 1 f α power law.

Journal ArticleDOI
TL;DR: In this paper, necessary and sufficient conditions for the existence of extended Schmidt decompositions with more than two subspaces are given, where the conditions are shown to be sufficient and necessary.