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arXiv quant-ph/9811063quant-ph
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分束器上的条件量子态变换

Conditional quantum-state transformation at a beam splitter

J. Clausen, M. Dakna, L. Knoll, D. -G. Welsch

摘要:

利用分束器上的条件测量,在二端口非幺正变换的概念下,研究了信号模的量子态的变换。允许任意的量子态的输入参考模式和输出参考模式上的测量进行,我们表明,非幺正变换算子可以作为一个$s$有序算子产品,其中的值$s$是完全由分束器的反射率(或透射率)的绝对值。的形式主义概括了以前得到的结果,可以恢复通过简单的规范的非酉变换算子。作为应用,我们考虑了类薛定谔猫态的产生。扩展到混合状态和不完美的检测概述。

英文摘要:

Using conditional measurement on a beam splitter, we study the transformation of the quantum state of the signal mode within the concept of two-port non-unitary transformation. Allowing for arbitrary quantum states of both the input reference mode and the output reference mode on which the measurement is performed, we show that the non-unitary transformation operator can be given as an $s$-ordered operator product, where the value of $s$ is entirely determined by the absolute value of the beam splitter reflectance (or transmittance). The formalism generalizes previously obtained results that can be recovered by simple specification of the non-unitary transformation operator. As an application, we consider the generation of Schrödinger-cat-like states. An extension to mixed states and imperfect detection is outlined.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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