Entanglement of microwave-optical modes in a strongly coupled electro-optomechanical system
Entanglement of microwave-optical modes in a strongly coupled electro-optomechanical system
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DOI：
10.1103/physreva.101.032345
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发表时间：
2020-01
影响因子：
2.9
通讯作者：
Changchun Zhong;Xu Han;H. Tang;Liang Jiang
中科院分区：
文献类型：
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作者：
Changchun Zhong;Xu Han;H. Tang;Liang Jiang
在给定可靠的微波-光学纠缠的情况下，可以通过量子隐形传态实现微波与光学之间的量子传输，即基于纠缠的量子传输。为了实现这一协议，在两个频率之间需要一个高保真的纠缠源。在本文中，我们研究了强耦合条件下基于一般腔电光机械系统的微波和光纠缠的产生。在微波和光学输出光谱中显示了分裂，并量化了两个模之间的频率纠缠。我们证明了纠缠可以直接在频段自由度中编码，并提出了一种验证纠缠光子对的可行实验。对实验实现进行了系统的分析，确定了纠缠验证的较佳参数方案。通过对实际纠缠缺陷的分析，给出了一个不等式作为纠缠验证的判据。
Quantum transduction between microwave and optics can be realized by quantum teleportation if given reliable microwave-optical entanglement, namely entanglement-based quantum transduction. To realize this protocol, an entangled source with high-fidelity between the two frequencies is necessary. In this paper, we study the microwave and optical entanglement generation based on a generic cavity electro-optomechanical system in the strong coupling regime. Splittings are shown in the microwave and optical output spectra and the frequency entanglement between the two modes is quantified. We show that entanglement can be straightforwardly encoded in the frequency-bin degree of freedom and propose a feasible experiment to verify entangled photon pairs. The experimental implementation is systematically analyzed, and the preferable parameter regime for entanglement verification is identified. An inequality is given as a criterion for good entanglement verification with analysis of practical imperfections.