将自由传播的单光子作为量子静止光脉冲捕获到原子系综中

IF 4.2 Q2 QUANTUM SCIENCE & TECHNOLOGY AVS quantum science Pub Date : 2022-04-08 DOI:10.1116/5.0093545
U. Kim, Y. Ihn, Chung-Hyun Lee, Yoon-Ho Kim
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引用次数: 3

摘要

有效的光子-光子相互作用是实现量子信息处理的关键因素之一。然而,由于光子的玻色子性质,相互作用必须经常通过原子介质进行调解,而与效率密切相关的相互作用时间取决于原子-光子相互作用的性质。虽然电磁感应透明效应确实提供了光子量子记忆的可能性,但它并没有增加相互作用时间,因为它完全将光子态映射到原子态。相反,静止光脉冲(SLP)效应将光子态困在群速度为零的原子介质中,从而开启了增强相互作用时间的可能性。在这项工作中,我们报告了通过量子SLP (QSLP)过程将自由传播的单光子捕获到冷原子系综中的第一个实验演示。我们最终证明,在QSLP过程中,单光子态的量子特性得到了很好的保留。我们的工作为有效的光子-光子相互作用、奇异光子态和光子系统中的多体模拟的新方法铺平了道路。
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Trapping a free-propagating single-photon into an atomic ensemble as a quantum stationary light pulse
Efficient photon–photon interaction is one of the key elements for realizing quantum information processing. The interaction, however, must often be mediated through an atomic medium due to the bosonic nature of photons, and the interaction time, which is critically linked to the efficiency, depends on the properties of the atom–photon interaction. While the electromagnetically induced transparency effect does offer the possibility of photonic quantum memory, it does not enhance the interaction time as it fully maps the photonic state to an atomic state. The stationary light pulse (SLP) effect, on the contrary, traps the photonic state inside an atomic medium with zero group velocity, opening up the possibility of enhanced interaction time. In this work, we report the first experimental demonstration of trapping a free-propagating single-photon into a cold atomic ensemble via the quantum SLP (QSLP) process. We conclusively show that the quantum properties of the single-photon state are preserved well during the QSLP process. Our work paves the way for new approaches for efficient photon–photon interactions, exotic photonic states, and many-body simulations in photonic systems.
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CiteScore
9.90
自引率
0.00%
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