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arXiv 2103.14360quant-ph
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通过电磁真空的电光采样实现Unruh-DeWitt探测器

Realizing an Unruh-DeWitt detector through electro-optic sampling of the electromagnetic vacuum

Sho Onoe, Thiago L. M. Guedes, Andrey S. Moskalenko, Alfred Leitenstorfer, Guido Burkard, Timothy C. Ralph

摘要:

提出了一个新的理论框架来描述宽带量子态,特别是量子真空的电光探测的实验进展。利用量子场论中关于时空度规的基本概念,电光效应背后的非线性相互作用可以用在很短的时间间隔内耦合到共轭场的Unruh-DeWitt探测器来重新表述。当耦合持续的时间间隔相当于检测到的场模式的振荡周期(即子循环制度),虚拟粒子居住的场真空转移到检测器的形式,真正的激发。我们证明,这种行为可以严格地转换到量子真空的电光采样的情况下,其中(光谱过滤)探针作为Unruh-DeWitt探测器工作,其相互作用产生的光子来自居住在电磁真空中的虚拟粒子。我们讨论了这些过程的具体工作制度,以及通过表征参与检测的量子光的后果。

英文摘要:

A new theoretical framework to describe the experimental advances in electro-optic detection of broadband quantum states, specifically the quantum vacuum, is devised. By making use of fundamental concepts from quantum field theory on spacetime metrics, the nonlinear interaction behind the electro-optic effect can be reformulated in terms of an Unruh-DeWitt detector coupled to a conjugate field during a very short time interval. When the coupling lasts for a time interval comparable to the oscillation periods of the detected field mode (i.e. the subcycle regime), virtual particles inhabiting the field vacuum are transferred to the detector in the form of real excitations. We demonstrate that this behavior can be rigorously translated to the scenario of electro-optic sampling of the quantum vacuum, in which the (spectrally filtered) probe works as an Unruh-DeWitt detector, with its interaction-generated photons arising from virtual particles inhabiting the electromagnetic vacuum. We discuss the specific working regime of such processes, and the consequences through characterization of the quantum light involved in the detection.

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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