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We prove within the quantum formalism without reduction postulate that the no-cloning theorem and the principle of no-increasing of entanglement (in a bit weaker formulations) are equivalent. We argue that the result is a manifestation of more general principles governing quantum information...
The results of a kinetic model are presented which includes dust-dust collisions as a damping mechanism for the low-phase velocity dust-acoustic waves which have been observed (Pieper and Goree, Phys. Rev. Lett. 77 (1976) 3137) in a dusty plasma device. A comparison of our theoretical results...
We analyse dimension and entropy estimates from local measurements in a weakly coupled extensively chaotic system. We observe a staircase-like signature related to the coupling strength. This behaviour can be explained by studying the transformation between the spatial states and the states...
Based on the general form of the master equation for open quantum systems the tunneling is considered. Using the path integral technique a simple expression for the tunneling rate through a parabolic barrier is obtained. The tunneling strongly depends on the coupling with the environment....
We give a simple variation of the basic ideas of the BB84 quantum cryptographic scheme leading to a method of key expansion. A secure random sequence (the bases sequence) determines the encoding bases in a proposed scheme. Against incoherent attacks by Eve, using the bases sequence repeatedly is...
We investigate the existence, formation and stability of multipulse bound states in a system of two Ginzburg-Landau equations coupled by linear terms. The system includes linear gain, diffusion, dispersion, and cubic nonlinearity in one component, and only linear losses in the other. This is a...
We establish the exact correspondence of the Calogero-Marchioro-Wolfes model and several of its generalizations with free oscillators. This connection yields the eigenstates and leads to a proof of the quantum integrability. The usefulness of our method for finding new solvable models is then...
We have investigated the influence of the second-order correction to Rayleigh scattering on intensity squeezing and photon antibunching in the standard two-level thermal Jaynes-Cummings model, thereby extending our earlier work (Phys. Rev. A 56 (1997) 796).
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