{"product_id":"decoherence-entanglement-and-information-protection-in-complex-quantum-systems-proceedings-of-the-nato-arw-on-decoherence-entanglement-and-informat-9781402032820","title":"Decoherence, Entanglement and Information Protection in Complex Quantum Systems: Proceedings of the NATO Arw on Decoherence, Entanglement and Informat","description":"\u003cp\u003e • Author(s): Vladimir M. Akulin | A. Sarfati | G. Kurizki\u003cbr\u003e • Publisher: Springer\u003cbr\u003e • Publisher Imprint: Springer\u003cbr\u003e • BISAC: Waves \u0026amp; Wave Mechanics\u003c\/p\u003e\u003cp\u003eDynamics of an open system interacting with theenvironment considered as a thermostate may be formulatedin terms of a master equation with an integral operator allowing for the relaxation process, [Zwanzig 1960]. In some part- ular cases this operator hasashort-lastingkernel that enables one to consider therelaxation as a Markovian process and to obtainthe master equation inthe Lindblad form, [Lindblad 1976 (a)]. In some situations the memory effects become, however, important and the dynamics of thesystem gets much more involved, [Barnett 2001]. A similar situation arises inthe case where a set of consecutive or continuous measurements is performed. The purpose of this article is to consider a situation where some simplification of the generalform of the master equation with memory isstill possibleand the result isasimpler master equation. In particular, we consider the case of a dynamic system c- pled to a measured ancilla via a nondemolition interaction, [Caves 1980]. This simplifies the consideration essentiallywhereas providing an important special case inwhich the energy of the dynamic part is conserved. We consider a composite quantum system consisting of a dynamic part - teracting with an ancillary part, the latter being subject to repeated projective measurements. The entire quantum system is assumed to evolve unitarily d- ing time ? t between the measurements. As a specific example, we analyze a harmonic oscillator coupledtoatwo-level ancillathat issubject to measu- ments.\u003c\/p\u003e","brand":"Springer","offers":[{"title":"Paperback","offer_id":46892373999767,"sku":"9781402032820","price":16558.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0666\/3471\/1191\/files\/9781402032820.webp?v=1770280902","url":"https:\/\/atlanticbooks.com\/products\/decoherence-entanglement-and-information-protection-in-complex-quantum-systems-proceedings-of-the-nato-arw-on-decoherence-entanglement-and-informat-9781402032820","provider":"Atlantic Books","version":"1.0","type":"link"}