Decoherence and dissipation in quantum two-state systems

M Grigorescu

Physica A: Statistical Mechanics and its Applications, 1998, vol. 256, issue 1, 149-162

Abstract: The Brownian dynamics of the density operator for a quantum system interacting with a classical heat bath is described using a stochastic, non-linear Liouville equation obtained from a variational principle. The rate of the noise-induced transitions is expressed as a function of the environmental spectral density, and is discussed for the case of white noise and blackbody radiation. The time-scales of decoherence and dissipation are investigated numerically for a system of two quantum states. These are the ground and first excited state of the center of mass vibrations for a single ion confined in a harmonic trap.

Keywords: Browninan quantum dynamics; Decoherence; Dissipation (search for similar items in EconPapers)
Date: 1998
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Persistent link: https://EconPapers.repec.org/RePEc:eee:phsmap:v:256:y:1998:i:1:p:149-162

DOI: 10.1016/S0378-4371(98)00076-4

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