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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Affiliation: | 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 temperaturethermal bath is studied by expanding thelinear 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 upto the Ehrenfest time but is insufficient to destroy thequantum-classical transition. |
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Keywords: | quantum nonlinear oscillator linear entropy decoherence timscale |
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