| 耗散两态系统的动力学特性 |
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| 引用本文： | 衣学喜,张朝民.耗散两态系统的动力学特性[J].光子学报,1997,26(9):771-776. |
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| 作者姓名： | 衣学喜 张朝民 |
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| 作者单位： | [1]东北师范大学物理研究所 [2]佳木斯工学院物理教研室 |
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| 基金项目： | 吉林省科委青年研究基金 |
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| 摘 要： | 利用Born-Oppenheimer近似研究了零温时耗散两态系统的动力学特性.在不同环境谱分布下,给出了两态之间的跃迁几率随时间的变化.数值结果表明:当环境的谱分布为Ohmic形式时,跃迁几率是一个衰减的函数;而当谱分布为随机取值时,跃迁几率具有“量子跳跃”的特性.与之相对比,我们还给出了当把环境等价成无穷多个谱振子的集合时,跃迁几率随时间的变化.
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| 关 键 词： | 耗散两态系统 B-O近似 量子跃迁 |
| 收稿时间： | 1996-12-23 |
DYNAMICS OF THE DISSIPATIVE TWO-STATE SYSTEM |
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| Yi Xuexi, Zhang Chaomin, Wang Dongren.DYNAMICS OF THE DISSIPATIVE TWO-STATE SYSTEM[J].Acta Photonica Sinica,1997,26(9):771-776. |
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| Authors: | Yi Xuexi Zhang Chaomin Wang Dongren |
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| Institution: | 1. Institute of Theoretical Physics, Northeast Normal University, Changchun 130024;2. Department of Physics, Jilin University, Changchun 130023;3. Division of Physics, Jiamusi Institute of Technological Science, Jiamusi 154007;4. Department of Chemistry, Northeast Normal Unversity, Changchun 130024 |
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| Abstract: | Based on the Born-Oppenheimer approximation,the zero-temperature dynamics of the two-state system is studied in this paper. Treating the bath as bosons,the transition probability iS givenand discussed for various spectral distribution of the reservoir. As a result of computer siinulation,thetransition probability displays a .damped oscillation function of time, when the spectral distrubutiontakes so-called the Ohmic form with a cut-off mp,whereas the quantum jump appears in the transitionprobability when the spectral distribution is random with the same cut - off. For the purpose ofcomparison, the temporal properties of the probability is also derived and discussed for the case inwhich the bath is treated as infinite 0scillators. |
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| Keywords: | Dissipative two-state system B-O approximation Quantum jump |
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