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arXiv 0704.0639quant-ph
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量子态非高斯特性的一种度量

A measure of the non-Gaussian character of a quantum state

Marco G. Genoni, Matteo G. A. Paris, Konrad Banaszek

摘要:

我们解决了玻色量子态的非高斯特性的量化问题,并引入了一个非高斯性测度的基础上的希尔伯特-施密特距离的状态下检查和参考高斯态。我们详细分析了所提出的测度的性质,并利用它来评估一些相关的单模和多模量子态的非高斯性。分析了量子态在损耗高斯化和光子减去高斯化过程中的非高斯性演化。建议的措施是很容易计算的玻色子系统的任何状态,并允许定义一个相应的措施的非高斯字符的量子操作。

英文摘要:

We address the issue of quantifying the non-Gaussian character of a bosonic quantum state and introduce a non-Gaussianity measure based on the Hilbert-Schmidt distance between the state under examination and a reference Gaussian state. We analyze in details the properties of the proposed measure and exploit it to evaluate the non-Gaussianity of some relevant single- and multi-mode quantum states. The evolution of non-Gaussianity is also analyzed for quantum states undergoing the processes of Gaussification by loss and de-Gaussification by photon-subtraction. The suggested measure is easily computable for any state of a bosonic system and allows to define a corresponding measure for the non-Gaussian character of a quantum operation.

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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