Photon entanglement entropy as a probe of many-body correlations and fluctuations.
Photon entanglement entropy as a probe of many-body correlations and fluctuations.
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光子纠缠熵作为多体相关性和波动的探针。
DOI：
10.1063/1.5083613
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发表时间：
2018
期刊：
影响因子：
--
通讯作者：
E. Bittner
中科院分区：
文献类型：
--
作者：
Hao Li;A. Piryatinski;A. R. Srimath Kandada;Carlos Silva;E. Bittner
最近的理论和实验已经探索了使用纠缠光子作为物理系统的光谱探针。本文描述了纠缠双光子Fock态在光腔中散射的熵产生。我们使用微扰理论，通过扩展双光子散射矩阵的单光子项，其中我们通过一个复杂的耦合常数，λ引入光子-光子相互作用。我们表明，冯诺依曼熵提供了一个简洁的措施，这种相互作用。然后，我们开发了一个微观模型，并表明，在快速波动的限制，纠缠熵消失，而在缓慢波动的限制，纠缠熵依赖于波动的大小，并达到最大值。我们的结果表明，测量双光子纠缠的实验给出了有关激子-激子关联的微观信息。
Recent theories and experiments have explored the use of entangled photons as a spectroscopic probe of physical systems. We describe here a theoretical description for entropy production in the scattering of an entangled biphoton Fock state within an optical cavity. We develop this using perturbation theory by expanding the biphoton scattering matrix in terms of single-photon terms in which we introduce the photon-photon interaction via a complex coupling constant, ξ. We show that the von Neumann entropy provides a concise measure of this interaction. We then develop a microscopic model and show that in the limit of fast fluctuations, the entanglement entropy vanishes, whereas in the limit of slow fluctuations, the entanglement entropy depends on the magnitude of the fluctuations and reaches a maximum. Our result suggests that experiments measuring biphoton entanglement give microscopic information pertaining to exciton-exciton correlations.
使用量子纠缠光子探测动态对称性破缺
影响因子：
6.7
作者：
Li, H.;Piryatinski, A.;Jonathan, J.;Kandada, A.;Silva, C.;Bittner, E.
通讯作者：
Bittner, E.