Expressing Decoherence with Spectral and Stochastic Methods

2002/12/09 by David Cienfuegos Salgado, D. Salgado, Salgado, D. +3
Economics, Econometrics and Finance · Mathematics · Physics and Astronomy · #FOS: Physical sciences #Italy: Economic History and Contemporary Issues #Quantum Physics (quant-ph) #Statistical Methods and Inference #quant-ph

paper · pdf · doi:10.48550/arxiv.quant-ph/0212042

15 pages, no figures

arxiv created 2002/12/09 · openalex publication_date 2002/12/09 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

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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