| Wigner相空间中的相干态和压缩态 |
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| 引用本文： | 金维睦. Wigner相空间中的相干态和压缩态[J]. 四川师范大学学报(自然科学版), 1991, 0(5) |
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| 作者姓名： | 金维睦 |
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| 作者单位： | 四川师范大学物理系 |
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| 摘 要： | 在Wigner相空间中,相干态和压缩态可以表示成谐振子基态的正则变换.本文系统讨论了此种正则变换的群性质.其次,由相干态和压缩态的Wigner分布函数可以对量子光学的观测量作定量计算.并用Parallel-Axis定理计算了光子数及其方差.最后,把相空间的标度变换映射为Hilbert空间中的量子么正算符.此么正算符与通常的压编算符一致.
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| 关 键 词： | 相干态 压缩态 Wigner相空间 |
THE COHERENT STATE AND SQUEEZED STATE IN WIGNER-PHASE-SPACE. |
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| Jin Weimu. THE COHERENT STATE AND SQUEEZED STATE IN WIGNER-PHASE-SPACE.[J]. Journal of Sichuan Normal University(Natural Science), 1991, 0(5) |
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| Authors: | Jin Weimu |
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| Affiliation: | Department of Physics |
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| Abstract: | In Wigner-phase -space (WPS),the coherent states (CS) and squeezed states (SS)can be described by canonical trans- formations of the harmonic-oscillator's ground state. In this paper the group properties of these transformations are discussed in detail. Next, based on canonical transformation properties of the Wigner -function an algorithm is developed for calculating observed quantities in CS and SS. Finally, the linear canonical transformations in WPS are mapped to unitary quantum-me- chanical onerafors in Hilbert-space to produce usual squeezed operators. |
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| Keywords: | Wigner-phase space coherent state squeezed state. |
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