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Decoherence by a non-Markovian and non-Gaussian Environment
[摘要] This thesis studies a spin-star model and an open spin-star model. The spin-star model is exactly solvable, and the approximation methods can be applied and compared with the exact solution. As this model is shown to be non-Gaussian and non-Markovian, Born-Markovian approximation is not valid. The comparison of Nakajima-Zwanzig and time-convolutionless methods show that the performances of those two techniques depend on the specific property of the model. The open spin-star model is not exactly solvable and the analytical solution under Gaussian approximation is obtained.
[发布日期]  [发布机构] University of Waterloo
[效力级别] non-Gaussian [学科分类] 
[关键词] non-Markovian;non-Gaussian;decoherence;Physics [时效性] 
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