Decoherence of a Quantum Nonlinear Oscillator Under a Non-zero Temperature Thermal Bath |
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Authors: | HAN Li-Ping ZHOU Ling SONG He-Shan |
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Institution: | Department of Physics, Dalian University of Technology, Dalian 116023, China |
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Abstract: | The characteristic time
τD for decoherence process of a quantum nonlinear oscillator system under a non-zero temperature
thermal bath is studied by expanding the
linear entropy. By numerical analysis, it is shown that at a non-zero temperature, the quantum coherence decays much faster than at zero temperature. Moreover, the non-zero temperature thermal bath will bring a crucial suppression to the quantum effects of the observables, which causes these quantum effects to become unable to persist up
to the Ehrenfest time but is insufficient to destroy the
quantum-classical transition. |
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Keywords: | quantum nonlinear oscillator linear entropy decoherence timscale |
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