arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2007.10948quant-phphysics.optics
收藏

室温原子系综之间的量子纠缠

Heralding Quantum Entanglement between Two Room-Temperature Atomic Ensembles

Hang Li, Jian-Peng Dou, Xiao-Ling Pang, Tian-Huai Yang, Chao-Ni Zhang, Yuan Chen, Jia-Ming Li, Ian A. Walmsley, Xian-Min Jin

摘要:

在单个节点之间建立量子纠缠对于构建大规模量子网络、实现安全量子通信、分布式量子计算、增强型量子精密测量和量子力学的基础测试至关重要。然而,共享纠缠仅在极低温度或良好孤立系中观察到,这限制了量子网络的实际应用。在这里,我们报告的实现预示着量子纠缠之间的两个原子系综在室温下,其中每一个包含数十亿个运动的原子。通过对映射出的纠缠态的量子干涉、纠缠度和关联测量,我们强有力地证实了在两个原子系综中存在一个离域的单激发。值得注意的是,原子系综的量子纠缠可以通过延迟选择的特性来操作,这说明了内置量子存储器的重要性。所展示的构建块为构建量子网络和在环境条件下在多个远程节点上分配纠缠铺平了道路。

英文摘要:

Establishing quantum entanglement between individual nodes is crucial for building large-scale quantum networks, enabling secure quantum communication, distributed quantum computing, enhanced quantum metrology and fundamental tests of quantum mechanics. However, the shared entanglements have been merely observed in either extremely low-temperature or well-isolated systems, which limits the quantum networks for the real-life applications. Here, we report the realization of heralding quantum entanglement between two atomic ensembles at room temperature, where each of them contains billions of motional atoms. By measuring the mapped-out entangled state with quantum interference, concurrence and correlation, we strongly verify the existence of a single excitation delocalized in two atomic ensembles. Remarkably, the heralded quantum entanglement of atomic ensembles can be operated with the feature of delay-choice, which illustrates the essentiality of the built-in quantum memory. The demonstrated building block paves the way for constructing quantum networks and distributing entanglement across multiple remote nodes at ambient conditions.

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。

↑