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arXiv 2103.11054quant-ph
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高斯纠缠下的量子测距

Quantum ranging with Gaussian entanglement

Quntao Zhuang

摘要:

众所周知,纠缠可以使量子信息处理任务受益。量子照明,当第一次被提出时,是令人惊讶的,因为纠缠的好处生存纠缠破坏噪音。从那时起,许多人致力于研究噪声环境下的量子传感。然而,这种方案的适用性仅限于二进制量子假设检验场景。在目标检测方面,这种方案每次询问单个极化-方位角-仰角-距离-多普勒分辨率仓,限制了对雷达检测的影响。我们解决这个二进制假设的限制,提出了一个量子测距协议增强纠缠。通过制定一个测距任务作为一个多元假设检验问题,我们表明,纠缠使一个6 dB的优势,对最佳的经典方案的误差指数。此外,所提出的测距协议还可以用于实现脉冲位置调制的纠缠辅助通信协议。我们的测距协议揭示了纠缠在一般量子假设检验任务中的潜力,并为具有可证明的量子优势的量子测距雷达铺平了道路。

英文摘要:

It is well known that entanglement can benefit quantum information processing tasks. Quantum illumination, when first proposed, is surprising as entanglement's benefit survives entanglement-breaking noise. Since then, many efforts have been devoted to study quantum sensing in noisy scenarios. The applicability of such schemes, however, is limited to a binary quantum hypothesis testing scenario. In terms of target detection, such schemes interrogate a single polarization-azimuth-elevation-range-Doppler resolution bin at a time, limiting the impact to radar detection. We resolve this binary-hypothesis limitation by proposing a quantum ranging protocol enhanced by entanglement. By formulating a ranging task as a multiary hypothesis testing problem, we show that entanglement enables a 6-dB advantage in the error exponent against the optimal classical scheme. Moreover, the proposed ranging protocol can also be utilized to implement a pulse-position modulated entanglement-assisted communication protocol. Our ranging protocol reveals entanglement's potential in general quantum hypothesis testing tasks and paves the way towards a quantum-ranging radar with a provable quantum advantage.

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。

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