多体退相干实现的光子减法
Photon Subtraction by Many-Body Decoherence.
作者信息
Murray C R, Mirgorodskiy I, Tresp C, Braun C, Paris-Mandoki A, Gorshkov A V, Hofferberth S, Pohl T
机构信息
Center for Quantum Optics and Quantum Matter, Department of Physics and Astronomy, Aarhus University, Ny Munkegade 120, DK 8000 Aarhus C, Denmark.
5. Physikalisches Institut and Center for Integrated Quantum Science and Technology, Universität Stuttgart, Pfaffenwaldring 57, 70569 Stuttgart, Germany.
出版信息
Phys Rev Lett. 2018 Mar 16;120(11):113601. doi: 10.1103/PhysRevLett.120.113601.
We experimentally and theoretically investigate the scattering of a photonic quantum field from another stored in a strongly interacting atomic Rydberg ensemble. Considering the many-body limit of this problem, we derive an exact solution to the scattering-induced spatial decoherence of multiple stored photons, allowing for a rigorous understanding of the underlying dissipative quantum dynamics. Combined with our experiments, this analysis reveals a correlated coherence-protection process in which the scattering from one excitation can shield all others from spatial decoherence. We discuss how this effect can be used to manipulate light at the quantum level, providing a robust mechanism for single-photon subtraction, and experimentally demonstrate this capability.
我们通过实验和理论研究了存储在强相互作用原子里德堡系综中的光子量子场与另一个光子量子场的散射。考虑到该问题的多体极限，我们推导出了多个存储光子散射诱导空间退相干的精确解，从而能够严格理解潜在的耗散量子动力学。结合我们的实验，该分析揭示了一种相关的相干保护过程，其中一个激发的散射可以保护所有其他激发免受空间退相干的影响。我们讨论了如何利用这种效应在量子水平上操纵光，提供了一种用于单光子减法的稳健机制，并通过实验证明了这种能力。
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