Decoherence of histories and hydrodynamic equations for a linear oscillator chain
نویسندگان
چکیده
منابع مشابه
Decoherent Histories and Hydrodynamic Equations
For a system consisting of a large collection of particles, a set of variables that will generally become effectively classical are the local densities (number, momentum, energy). That is, in the context of the decoherent histories approach to quantum theory, it is expected that histories of these variables will be approximately decoherent, and that their probabilites will be strongly peaked ab...
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In the decoherent histories approach to the quantum mechanics of closed systems, the existence of a quasiclassical domain in a large complex system is not postulated, but is a calculable emergent feature contingent on the Hamiltonian and initial conditions. Gell-Mann and Hartle have argued that the variables typically characterizing the quasiclassical domain are the integrals over small volumes...
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In the context of the decoherent histories approach to the quantum mechanics of closed systems, Gell-Mann and Hartle have argued that the variables typically characterizing the quasiclassical domain of a large complex system are the integrals over small volumes of locally conserved densities – hydrodynamic variables. The aim of this paper is to exhibit some simple models in which approximate de...
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The time development of the reduced density matrix for a quantum oscillator damped by coupling it to an ohmic environment is calculated via an identity of the Debye-Waller form. Results obtained some years ago by Hakim and the author in the free-particle limit [1] are thus recovered. The evolution of a free particle in a prepared initial state is examined, and a previously published exchange [2...
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ژورنال
عنوان ژورنال: Physical Review D
سال: 2003
ISSN: 0556-2821,1089-4918
DOI: 10.1103/physrevd.68.025018