Download Decoherence, Entanglement and Information Protection in by Akulin and Sarfati.. PDF

By Akulin and Sarfati..

This e-book is a suite of articles at the modern prestige of Quantum Mechanics devoted to the basic problems with entanglement, decoherence, irreversibility, info processing, and keep an eye on of quantum evolution, with a view of attainable functions. It has multidisciplinary personality and is addressed at a extensive readership in physics, computing device technological know-how, chemistry, and electric engineering. it's written by way of the world-leading specialists in pertinent fields corresponding to Quantum Computing, Atomic, Molecular and Optical Physics, Condensed subject Physics, and Statistical Physics.

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Preparation of single photons by conditional measurements on a biphoton state. 43 Figure 2. (a) Interaction of Klyshko advanced wave with the pump generates a DFG mode that mimics that of the CPP. (b) In experiments, a laser beam aligned so as to obtain maximum transmission can play the role of the advanced wave. per, we neglect polarization entanglement (polarization is assumed to be welldefined in both PDC channels) and refraction inside the crystal. , ˜ (r) E ˜ (−) (r, t) E K s t (1) where α is proportional to the second order nonlinear susceptibility and is as˜ sumed frequency independent, K(r) describes the nonlinear crystal volume and is one inside and zero outside the crystal.

Lvovsky,4 Yu. P. Malakyan,5 and Ph. Walther6 1 Institute of Electronic Structure & Laser, Foundation for Research & Technology - Hellas, Heraklion 71110, Crete, Greece 2 Physics Department, Harvard University, Cambridge, MA 02138, USA 3 Yerevan State University, A. Manookyan 1, 375049, Yerevan, Armenia Institute for Physical Research, National Academy of Sciences, Ashtarak-2, 378410, Armenia 4 Department of Physics & Astronomy, University of Calgary, Alberta T2N 1N4, Canada and Fachbereich der Physik, Universität Konstanz, D-78457 Konstanz, Germany 5 Institute for Physical Research, National Academy of Sciences, Ashtarak-2, 378410, Armenia 6 Institut für Experimentalphysik, Universität Wien, Vienna, Austria and Institut für Quantenop- tik & Quanteninformation, Österreichische Akademie der Wissenschaften, Vienna, Austria Keywords: Photon entanglement, all-optical quantum computation, nonlinear optical media, atomic ensembles, atomic memory, electromagnetically induced transparency, spontaneous parametric down conversion.

Substantiation is given through a reduction of some subset of this model to the conventional language of quantum computing and application of the construction from [Ozhigov 2002 (b)]. Introduction and background Quantum computing is an unprecedented examination of the modern physics because it requires a level of control over microscopic sized objects which has never been reached artificially. While a mathematical theory of quantum computations is well developed, its physical implementation represents a serious challenge to our understanding of nature.

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