Decoherence by a non-Markovian and non-Gaussian Environment
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Date
2013-01-25T18:06:13Z
Authors
Qiao, Wenling
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Journal ISSN
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Publisher
University of Waterloo
Abstract
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.
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Keywords
non-Markovian, non-Gaussian, decoherence