Quantum Dissipative Threshold and Its Effect on Decay of Metastable State |
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| Authors: | BAO Jing-Dong |
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| Affiliation: | The Key Laboratory of Beam Technology and Material Modification of Ministry of Education, Beijing Normal University, Beijing 100875, China;Department of Physics, Beijing Normal University, Beijing 100875, China |
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| Abstract: | The coupling between system and reservoir is considered to belinear in the coordinates of the bath but nonlinear in the system'scoordinate. A dissipative thresholdis observed at finite temperatures due to nonlinear dissipation.The quantum decay rate of a metastable state includinghigher-order expanded terms of the coupling form function isproposed, which can be strongly decreased at finite temperatureswhen the quantum dissipative threshold is added to the saddlepoint of the potential. |
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| Keywords: | threshold decay rate nonlinear dissipation quantum correction factor |
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