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arXiv 2109.00728quant-phgr-qc
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引力红移引起量子干涉

Gravitational redshift induces quantum interference

David Edward Bruschi, Andreas W. Schell

摘要:

利用弯曲时空中的量子场论,证明了引力红移引起传播光子的量子态发生幺正变换。这发生在以有限带宽为特征的现实光子上,而具有尖锐频率的理想光子不会酉变换。我们发现,转换是一个模式混合操作,我们设计了一个协议,利用重力诱导的洪-欧-曼德尔的两个光子的状态上的干涉效应。测试这项工作的结果可以提供弯曲时空中量子场论的演示。

英文摘要:

We use quantum field theory in curved spacetime to show that gravitational redshift induces a unitary transformation on the quantum state of propagating photons. This occurs for realistic photons characterized by a finite bandwidth, while ideal photons with sharp frequencies do not transform unitarily. We find that the transformation is a mode-mixing operation, and we devise a protocol that exploits gravity to induce a Hong-Ou-Mandel-like interference effect on the state of two photons. Testing the results of this work can provide a demonstration of quantum field theory in curved spacetime.

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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