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题名: Quantum decay rate of a nonlinear dissipative system with fission-like potential near T-c
作者: Bao, JD ;  Zhuo, YZ ;  Wu, XZ
刊名: ZEITSCHRIFT FUR PHYSIK A-HADRONS AND NUCLEI
出版日期: 1996
卷号: 354, 期号:3, 页码:293-299
关键词: ACTIVATED RATE-PROCESSES ;  FINITE TEMPERATURES ;  WELL
学科分类: Physics
通讯作者: Bao, JD , BEIJING INST METEOROL,BEIJING 100081,PEOPLES R CHINA.
部门归属: CCAST WORLD LAB,BEIJING 100080,PEOPLES R CHINA; INST ATOM ENERGY,BEIJING 102413,PEOPLES R CHINA; ACAD SINICA,INST THEORET PHYS,BEIJING 100080,PEOPLES R CHINA
英文摘要: We use a thermodynamic scheme (imaginary free energy method) in terms of the path integral technique to study the quantum decay rates of a metastable state system coupled to a heat bath in the crossover temperature (T-c) region. In this region the transition between thermally activated decay and tunneling occurs. A nonlinear coupling form factor is used to overcome the divergent integral in the partition function near T-c. The decay rate formula based on the steepest descent approximation has been improved. A method is developed to calculate the real and imaginary parts of the partition function which combines a random walk method with fast-Fourier transform Monte-Carlo evaluation. For a nonlinear dissipative system with a damping correlation kernel of exponential form, the accurate numerical calculations are presented. The effects of nonlinear and frequency-dependent damping on the rate are shown.
收录类别: SCI
原文出处: 查看原文
内容类型: 期刊论文
URI标识: http://ir.itp.ac.cn/handle/311006/12643
Appears in Collections:理论物理所1978-2010年知识产出_期刊论文

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Recommended Citation:
Bao, JD,Zhuo, YZ,Wu, XZ. Quantum decay rate of a nonlinear dissipative system with fission-like potential near T-c[J]. ZEITSCHRIFT FUR PHYSIK A-HADRONS AND NUCLEI,1996,354(3):293-299.
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