Showing papers in "Physics Letters A in 2004"

TL;DR: In this paper, a nonlinear control method and based on Lyapunov stability theory to design controller to synchronize two identical chaotic systems or two different chaotic systems was introduced. But the technique was applied to two identical Lu systems and two different Lu systems.

TL;DR: This work considers nonlinear extensions of Granger's idea and proposes a conditional extended Granger causality measure that enables us to determine whether the causal relation between two signals is direct or mediated by another process.

TL;DR: In this paper, a mathematical expression of the nonextensivity in a nonisothermal plasma system with the Coulombian long-range interaction is studied in the framework of Tsallis statistics.

TL;DR: A protocol of multiparty secret sharing of quantum information based on entanglement swapping is analyzed and it is convenient to realize the quantum secret sharing among the members of any subset of users.

TL;DR: In this paper, the linear feedback synchronization and adaptive feedback synchronization with only one controller for a unified chaotic system are discussed, and two chaotic synchronization theorems are attained, and numerical simulations are given to show the effectiveness of these methods.

TL;DR: In this article, the analytical series solutions of the Schrodinger equation with position-dependent mass for the Morse potential are obtained by the series expansion method, and the position dependent mass themselves are expanded in the series about the origin.

TL;DR: In this article, it was predicted that appropriate weak measurements of particle position in the interval between preparation and post-selection would find the particle in two different places, each with certainty, and verified these predictions in an optical experiment and addressed the issues of locality and of negative probability.

TL;DR: In this paper, a modified geometrical optics of a quantum particle with a spin and an electromagnetic wave in a smooth inhomogeneous media is presented. But the authors do not consider the effect of the magnetic-monopole-like field (Berry curvature).

TL;DR: In this paper, the authors studied the Schrodinger equation with spatial mass distributions for a class of exactly solvable potentials and obtained the analytical solutions by transforming the mass distribution function into the effective potential, where both the original and the modified potential are physically relevant and precisely solvable.

TL;DR: In this article, the exact solution of the Dirac equation for a charged particle with position-dependent mass in the Coulomb field was obtained, and the discrete energy spectrum and spinor wave function were obtained explicitly.

TL;DR: In this paper, thermal and electrical transport properties of multi-walled carbon nanotubes (MWNTs) were investigated using pulsed photothermal reflectance and the two-terminal I-V methods.

TL;DR: In this article, a general concept for subdiffraction imaging and writing with focused light and conventional optics is described, which is unique in the fact that the giant optical nonlinearities required for breaking the diffraction barrier are realized at low light intensities.

TL;DR: In this paper, the propagation of longitudinal and transverse elastic waves oblique or perpendicular to the laminations of infinite periodically layered fourfold system is studied for one-dimensional phononic crystals with locally resonant structures.

TL;DR: In this paper, robust adaptive controllers are designed to ensure that the state of a dynamical network locally or globally asymptotically synchronize with an arbitrarily assigned state of an isolate node of the network.

TL;DR: In this paper, a new formulation of eigenproblem for phononic crystals is developed and the convergence of the new formulation in the band-structure calculations is examined in detail and compared with that of the conventional plane wave expansion (CPWE) method.

TL;DR: Two quantum signature schemes with message recovery relying on the availability of an arbitrator are proposed, one of which uses a public board and the other does not.

TL;DR: In this paper, the global stability of delayed fuzzy cellular neural networks with either constant delays or time varying delays is investigated and a suitable Lyapunov functional is constructed to guarantee the global exponential stability.

TL;DR: In this paper, the exact energy equation for s-wave bound states was obtained by solving the Klein-Gordon equation with equal scalar and vector Rosen-Morse-type potentials.

TL;DR: In this article, the synchronization of different order systems or reduced-order synchronization is studied, and the proposed strategy is an input-output control scheme which comprises an uncertainty estimator and an exponential controller.

TL;DR: In this article, the probability of electron-positron pair creation by a focused laser pulse is calculated using a 3D model of the electromagnetic field based on an exact solution of Maxwell equations.

TL;DR: It is shown that—under some conditions—it is possible to reconstruct an attractor from the recurrence plot, at least topologically, which means that all relevant dynamical information is contained in the plot.

TL;DR: Based on a suitable separation of chaotic systems, Lyapunov stability theory and matrix measure, the complete synchronization and anti-synchronization for chaotic systems are investigated in this paper.

TL;DR: In this paper, a new approach to calculate recurrence plots of multivariate time series, based on joint recurrences in phase space, was proposed, which allows to estimate dynamical invariants of the whole system, like the joint Renyi entropy of second order.

TL;DR: In this paper, an approach of adaptive synchronization and parameters identification of uncertain Rossler hyperchaotic system is proposed, which proves to be globally and asymptotically stable by means of Lyapunov method.

TL;DR: In this article, a robust global exponential stability analysis for interval recurrent neural networks (RNNs) via the linear matrix inequality (LMI) approach is proposed. But the authors assume that the values of the time-invariant uncertain parameters are bounded within given compact sets.

TL;DR: The improved scheme only induces half of the eavesdropping-induced channel loss in Wojcik's scheme, therefore, in a larger domain of the quantum channel transmission efficiency eta, the eavesdropper Eve can attack all the transmitted bits.

TL;DR: In this paper, the existence and global exponential stability of periodic solution for Hopfield-type model of neural network with impulses was studied. And the continuation theorem of coincidence degree theory and Lyapunov functions were used to study the existence of periodic solutions.

TL;DR: In this paper, the periodic wave solutions for a class of nonlinear partial differential equations, including the Davey-Stewartson equations and the generalized Zakharov equations, are obtained by using the Fexpansion method, which can be regarded as an overall generalization of the Jacobi elliptic function expansion method recently proposed.

TL;DR: In this paper, a model independent formulation for inherent and unavoidable extra noises in arbitrary joint measurements on single systems, from which Heisenberg's original uncertainty relation is proven valid for any joint measurements with statistically independent noises.

TL;DR: This work analyzes the security of two chaotic cryptosystems, which use a dynamically updated look-up table and also work as stream ciphers, and provides different attack techniques to recover the keystream used by the algorithms.