Expressing Decoherence with Spectral and Stochastic Methods

Details Expressing Decoherence with Spectral and Stochastic Methods Expressing Decoherence with Spectral and Stochastic Methods

2002-12-09

arxiv.org/abs/quant-ph/0212042v1

Physics

Quantum Physics

15 pages, no figures

Scientific paper

We suggest a novel proposal to express decoherence in open quantum systems by jointly employing spectral and stochastic methods. This proposal, which basically perturbs the unitary evolution operator in a random fashion, allows us to embrace both markovian and nonmarkovian situations with little extra effort. We argue that it can be very suitable to deal with models where an approximation neglecting some degrees of freedom is undertaken. Mathematical simplicity is also obtained both to solve some master equations and to arrive at experimentally measured decoherence functions.

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