Practical Route to Entanglement-Assisted Communication Over Noisy Bosonic Channels
Practical Route to Entanglement-Assisted Communication Over Noisy Bosonic Channels
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DOI：
10.1103/physrevapplied.13.034029
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发表时间：
2020-03-11
影响因子：
4.6
通讯作者：
Zhuang, Quntao
中科院分区：
文献类型：
--
作者：
Shi, Haowei;Zhang, Zheshen;Zhuang, Quntao
纠缠态在量子信息处理中具有很大的优势，但损耗和噪声阻碍了它在实际应用中的应用。虽然几十年来人们都知道，有损耗和有噪声的玻色子信道的经典通信容量可以通过纠缠显着增强，但没有实用的编码和解码方案可用于实现任何纠缠使能的优点。在这里，我们报告结构化的编码和解码方案，这样的纠缠辅助通信的情况。具体来说，我们表明，纠缠双模压缩真空态的相位编码饱和的纠缠辅助的经典通信能力的一个非常嘈杂的信道，克服了根本的限制存在的秘密通信，没有纠缠的援助。然后，我们构造接收机的最佳假设检验协议与离散相位调制和最佳噪声相位估计协议与连续相位调制。我们的研究结果为在射频和微波光谱范围内的纠缠辅助通信和传感铺平了道路。
Entanglement offers substantial advantages in quantum information processing, but loss and noise hinder its application in practical scenarios. Although it has been well known for decades that the classical communication capacity of lossy and noisy bosonic channels can be significantly enhanced by entanglement, no practical encoding and decoding schemes are available to realize any entanglement-enabled advantage. Here, we report structured encoding and decoding schemes for such an entanglement-assisted communication scenario. Specifically, we show that phase encoding on an entangled two-mode squeezed vacuum state saturates the entanglement-assisted classical communication capacity of a very noisy channel and overcomes the fundamental limit on covert communication that exists without the assistance of entanglement. We then construct receivers for optimum hypothesis-testing protocols with discrete phase modulation and for optimum noisy phase-estimation protocols with continuous phase modulation. Our results pave the way for entanglement-assisted communication and sensing in the radio-frequency and microwave spectral ranges.