Event horizons are tunable factories of quantum entanglement
Event horizons are tunable factories of quantum entanglement
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DOI：
10.1142/s0218271822420081
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发表时间：
2022-09
影响因子：
2.2
通讯作者：
I. Agulló;Anthony J. Brady;Dimitrios Kranas
中科院分区：
文献类型：
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作者：
I. Agulló;Anthony J. Brady;Dimitrios Kranas
众所周知，事件视界通过霍金效应产生量子关联。然而，我们认为，纠缠的产生可以根据需要通过适当地照亮视界来调节。我们采用量子信息理论的技术来量化霍金过程中产生的纠缠，并表明，虽然环境热噪声（例如宇宙微波背景辐射）会降低它，但使用压缩输入可以以受控的方式提高内部和外部区域之间的不可分离性。我们进一步将我们的想法应用于实验室中炮制的模拟事件视界，并坚持认为调整纠缠产生的能力为检测难以捉摸的霍金效应的量子签名提供了一条有前途的途径。
That event horizons generate quantum correlations via the Hawking effect is well known. We argue, however, that the creation of entanglement can be modulated, as desired, by appropriately illuminating the horizon. We adapt techniques from quantum information theory to quantify the entanglement produced during the Hawking process and show that, while ambient thermal noise (e.g. cosmic microwave background radiation) degrades it, the use of squeezed inputs can boost the nonseparability between the interior and exterior regions in a controlled manner. We further apply our ideas to analog event horizons concocted in the laboratory and insist that the ability to tune the generation of entanglement offers a promising route towards detecting quantum signatures of the elusive Hawking effect.