| 量子混合态的统计角 |
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| 引用本文： | 朱栋培,王桂星,王仁川.量子混合态的统计角[J].物理学报,1992,41(4):543-549. |
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| 作者姓名： | 朱栋培 王桂星 王仁川 |
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| 作者单位： | (1)中国科学技术大学近代物理系,合肥,230026; (2)中国科学技术大学天体物理中心 |
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| 摘 要： | 本文把关于量子纯态之间的统计角概念推广到量子混合态,并提出了单个混合态的发散角这一概念,导出了纯态判据,用到测量上,响应函数不过是量子系统与仪器之间的统计角余弦的平方,而测量过程中的熵增加则显现为混合态发散角的扩大。
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| 关 键 词： | 量子 混合态 发散角 统计角 纯态 |
| 收稿时间： | 1991-04-17 |
STATISTICAL ANGLE OF QUANTUM MIXED STATES |
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| ZHU DONG-PEI,WANG REN-CHUAN and WANG GUI-XING.STATISTICAL ANGLE OF QUANTUM MIXED STATES[J].Acta Physica Sinica,1992,41(4):543-549. |
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| Authors: | ZHU DONG-PEI WANG REN-CHUAN and WANG GUI-XING |
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| Abstract: | The statistical angle between quantum pure stages has been generalized to quantum mixed states. For the case of a single mixed state, it leads to a concept of divergence angle. A criterion for pure state is obtained. In the quantum measurement the information function is the squared cosine of statistical angle between the quantum system and the instrument. The entropy increase during the measurement process appears to be the expanding of the divergence angle. |
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