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Quantum coherence and non-Markovianity of an atom in a dissipative cavity under weak measurement 下载免费PDF全文
Quantum coherence and non-Markovianity of an atom in a dissipative cavity under weak measurement are investigated in this work. We find that: the quantum coherence obviously depends on the initial atomic state, the strength of the weak measurement and its reversal, the atom-cavity coupling constant and the non-Markovian effect. It is obvious that the weak measurement effect protects the coherence better. The quantum coherence is preserved more efficiently for larger atom-cavity coupling. The stronger the non-Markovian effect is, the more slowly the coherence reduces. The quantum coherence can be effectively protected by means of controlling these physical parameters. 相似文献
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运用非马尔可夫量子理论与熵压缩理论,研究了非马尔可夫环境下经典场驱动Jaynes-Cummings模型中原子的熵压缩,考察了非马尔可夫效应、经典场驱动、体系失谐量对原子熵压缩的影响.用非马尔可夫过程的记忆效应解释了原子熵压缩的动力学行为.结果表明:非马尔可夫效应和经典场驱动的共同作用有利于原子熵压缩的产生与维持.在非马尔可夫环境下,通过选择适当的系统参数,可以产生压缩度大、压缩持续时间长的原子熵压缩态.研究结果为利用光场-原子相互作用制备压缩度大、压缩持续时间长的最佳原子压缩态提供了可能途径. 相似文献
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We investigate the squeezing properties of a trapped ion in a standing-wave laser. Our results show that the squeezing of a trapped ion in the standing-wave laser is dependent on its position in the latter, the detuning parameter and the initial average phonon number. 相似文献
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依赖强度耦合J—C模型场熵的演化 总被引:12,自引:2,他引:10
研究了依赖强度耦合J-C模型场熵演化的动力学特性,考察了原子相干性对场熵演化的影响。 相似文献
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We study the dynamics of a trapped ion placed at an antinode of the standing wave inside a high finesse cavitywith consideration of the second sideband excitation between the ionic internal levels and the light field. We investigatethe entanglement of the three subsystems embodying the ionic internal levels, the vibrational mode of the ion and thecavity field. 相似文献
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研究了非旋波近似下Jaynes-Cummings(J-C)模型中的场熵演化规律,并与旋波近似下的相应结果进行比较,讨论了虚光子过程对场熵演化的影响。 相似文献
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We study the dynamics of a trapped ion placed at an antinode of the standing wave inside a high finesse cavity with consideration of the second sideband excitation between the ionic internal levels and the light field. We investigate the entanglement of the three subsystems embodying the ionic internal levels, the vibrational mode of the ion and the cavity field. 相似文献
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