SQUEEZING IN CORRELATED QUANTUM-SYSTEMS
SQUEEZING IN CORRELATED QUANTUM-SYSTEMS
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DOI：
10.1080/09500348714550781
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发表时间：
1987-06-01
影响因子：
1.3
通讯作者：
KNIGHT, PL
中科院分区：
文献类型：
--
作者：
BARNETT, SM;KNIGHT, PL
讨论了简单量子光学系统中量子相关与压缩之间的关系。我们通过研究由参量下转换和类似的双光子过程产生的光的双模态来说明这种联系。这些系统中的模间关联导致了光子数和算子和差分算子的变化，以及两模叠加态的压缩。注意到当非经典光性质重要时对角相干态准概率函数p （α）的消失，并提出了双模系统的替代的、性能更好的Wigner函数和相干态期望q函数。
We discuss the connection between quantum correlations and squeezing in simple quantum optical systems. We illustrate this connection by a study of two-mode states of light produced by parametric down-conversion and similar two-photon processes. The intermode correlations in these systems are shown to be responsible for modifications in photon-number sum and difference operators, and for squeezing in the superpositions of the two modes. The disappearance of the diagonal coherent-state quasiprobability functionP(α) when non-classical light properties are important is noted, and alternative and better-behaved Wigner functions and coherent-state expectationQ-functions for the two-mode system are developed.