Geometric phase in a composite system subjected to decoherence |
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Authors: | J-B Liu J-H Li X-Y Lü A Zheng |
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Institution: | (1) Department of Physics, Huazhong University of Science and Technology, Wuhan, 430074, P.R. China;(2) Department of Mathematic and Physics, China University of Geosciences, Wuhan, 430074, P.R. China |
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Abstract: | In this paper, we investigate the geometric phase of a composite system which is composed of two spin-
particles driven by a
time-varying magnetic field. Firstly, we consider the special case that only one subsystem driven by time-varying magnetic
field. Using the quantum jump
approach, we calculate the geometric phase associated with the adiabatic evolution of the system subjected to decoherence.
The results show that the lowest
order corrections to the phase in the no-jump trajectory is only quadratic in decoherence coefficient. Then, both subsystem
driven by time-varying magnetic
field is considered, we show that the geometric phase is related to the exchange-interaction coefficient and polar angle of
the magnetic field. |
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Keywords: | 03 65 Vf Phases: geometric dynamic or topological 03 65 Yz Decoherence open systems quantum statistical methods |
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