Comparative studies of open qubit via Bloch equation and master equation of Redfield form |
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Authors: | Shen Yan Lu Yu-Ping and Liang Xian-Ting |
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Institution: | Department of Physics and Institute of Modern Physics, Ningbo University, Ningbo 315211, China |
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Abstract: | In this paper, we investigate the dynamics of an open qubit model by solving two sets of its reduced dynamical equations. One set of the equations is the well-known Bloch equations and the other is the widely investigated master equations of Redfield form. Both of them are obtained from the perturbation approximation which demands the system of interest weakly coupled to its environment. It is shown that the qubit has a longer decoherence and relaxiation time as the dynamics is described by the Redfield equantions. |
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Keywords: | reduced dynamics relaxation decoherence |
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