| 时变耦合对含相位阻尼J-C模型线性熵的影响 |
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| 引用本文： | 周青春,张先寒,刘生. 时变耦合对含相位阻尼J-C模型线性熵的影响[J]. 江苏科技大学学报(社会科学版), 2009, 23(2): 179-182 |
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| 作者姓名： | 周青春 张先寒 刘生 |
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| 作者单位： | 江苏科技大学,数理学院,江苏,镇江,212003;江苏科技大学,数理学院,江苏,镇江,212003;江苏科技大学,数理学院,江苏,镇江,212003 |
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| 基金项目： | 江苏省高校青蓝工程基金 |
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| 摘 要： | 在腔场为相干态场,原子处于等概率叠加态的初始条件下,采用色散近似方法,研究了存在相位耗散且含与时间成正比变化的场-原子耦合的Jaynes-Cummings模型的线性熵演化特征.数值计算结果表明,与常系数耦合相比较,时变耦合不改变原子和腔场复合系统的线性熵的时间演化,但破坏原子线性熵及场线性熵的振荡周期性.在系统演化初期,时变耦合抑制并延迟原子和场相干性的丢失.耦合系数突变会显著提高子系统线性熵的振荡频率.
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| 关 键 词： | 线性熵 耗散 量子相干性 |
Effect of time-dependent coupling on linear entropies of the Jaynes-Cummings model with phase damping |
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| Zhou Qingchun,Zhang Xianhan,Liu Sheng. Effect of time-dependent coupling on linear entropies of the Jaynes-Cummings model with phase damping[J]. Journal of Jiangsu University of Science and Technology(Natural Science Edition), 2009, 23(2): 179-182 |
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| Authors: | Zhou Qingchun Zhang Xianhan Liu Sheng |
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| Affiliation: | School of Mathematics and Physics;Jiangsu University of Science and Technology;Zhenjiang Jiangsu 212003;China |
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| Abstract: | Under the initial condition that the cavity field is in a coherent state and the atom is in the equal probability superposition of the excited and ground states,time-evolution properties of linear entropies for the Jaynes-Cummings model with time-dependent atom-field coupling proportional to interaction time in the presence of phase damping were investigated in the dispersive approximation.Numerical results indicate that compared with the constant atom-field coupling,time-dependent coupling destroys periodi... |
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| Keywords: | linear entropy dissipation quantum coherence |
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