Titlebook: Decoherence, Entanglement and Information Protection in Complex Quantum Systems; Proceedings of the N V.M. Akulin,A. Sarfati,S. Pellegrin C

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Strong Entanglement of Bright Light Beams in Controlled Quantum Systemsin-Podolsky-Rosen states of intense light beams based on the time-modulation of quantum dissipative dynamics. We demonstrate an essential improvement of the degree of entanglement in time-modulated NOPO in comparison with the ordinary one, if the frequency of modulation is close to the decay rate of the dissipative processes.

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Non-Markovian Decay and Decoherence in Open Quantum Systemsnvironment, and the consequent decay of the atomic quantum state may become nonexponential and possibly even nonmonotonic. Here we consider different descriptions of non-Markovian evolutions and also hazards associated with them, as well as some physical situations in which the environment of a quantum system induces non-Markovian phenomena.

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https://doi.org/10.1007/978-1-4615-4549-1I briefly review the status of entanglement in quantum information processing. Its role is mostly well understood for pure-state processing, but less so for mixed-state processing. I consider a case where we can answer whether entanglement is necessary in mixed-state quantum computation.

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Bai Xue,Naijun Zhan,Yangjia Li,Qiuye WangThe spatiotemporal optical mode of the single-photon Fock state prepared by conditional measurements on a biphoton is investigated and found to be identical to that of a classical wave due to a nonlinear interaction of the pump wave and Klyshko’s advanced wave. We discuss the applicability of this identity in various experimental settings.

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On the Advanced Wave Model of Parametric Down-ConversionThe spatiotemporal optical mode of the single-photon Fock state prepared by conditional measurements on a biphoton is investigated and found to be identical to that of a classical wave due to a nonlinear interaction of the pump wave and Klyshko’s advanced wave. We discuss the applicability of this identity in various experimental settings.

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Tolerating Faults in Counting Networksng would suffice to fulfill all quantum computations without valuable slowdown in the framework of such model when an interaction of diagonal type is fixed and permanent. Substantiation is given through a reduction of some subset of this model to the conventional language of quantum computing and ap

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