| 单声子模自旋－玻色子模型的定态演化 |
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| 引用本文： | 龙曼.单声子模自旋－玻色子模型的定态演化[J].科学技术与工程,2012,12(1):7-10. |
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| 作者姓名： | 龙曼 |
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| 作者单位： | 暨南大学物理系,广州,510632 |
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| 摘 要： | 采用MATLAB数值计算的方法观察单声子模自旋玻色子模型的定态演化.研究了0＜λ/ω≤2,△/ω=0.1的情况下出现的几种演化模式.表明耦合强度对模型能态演化具有很大的影响:在一定耦合强度区间内,会出现一定的演化规律.特别是当参数λ/ω＞0.5时开始出现双周期的现象.进一步观察了两能级正(负)势阱中各个能态在时间区间0,30]内的平均隧穿几率(平均跃迁几率)随耦合强度的变化情况,并给出了几种演化模式的转变点.
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| 关 键 词： | 自旋-玻色子模型 定态 耦合强度 隧穿几率 |
| 收稿时间： | 2011/10/20 0:00:00 |
| 修稿时间： | 2011/10/26 0:00:00 |
Steady-state evolution of spin-boson model of single model |
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| Long Man.Steady-state evolution of spin-boson model of single model[J].Science Technology and Engineering,2012,12(1):7-10. |
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| Authors: | Long Man |
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| Institution: | LONG Man(Department of Physics,Jinan University,Guangzhou 510632,P.R.China) |
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| Abstract: | The steady-state evolution of single-phonon spin-boson model is observed through the method of MATLAB numerical calculation,and analysed several evolutionary patterns while the coupling strength range from 0 to 2 as well as tunneling splitting equals 0.1.The result shows that the coupling strength has exerted a significant influence on states evolution,and there is an exclusive evolution discipline in a certain coupling strength interval,especially when the coupling strength is greater than 0.5 two-cycle phenomenon emerges.The average probability of each energy state in the time interval changes with the coupling strength is further calculated,and the result gives several evolution turning points. |
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| Keywords: | spin-boson model steady-state coupling strength quantum splitting |
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