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arXiv 1909.13432quant-ph
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Einstein-Podolsky-Rosen转向的设备无关验证

Device-independent verification of Einstein-Podolsky-Rosen steering

Yuan-Yuan Zhao, Chao Zhang, Shuming Cheng, Xinhui Li, Yu Guo, Bi-Heng Liu, Huan-Yu Ku, Shin-Liang Chen, Qiaoyan Wen, Yun-Feng Huang, Guo-Yong Xiang, Chuan-Feng Li, Guang-Can Guo

摘要:

纠缠态是量子力学的核心,也是量子信息中各种应用的重要资源。如果纠缠可以在不信任观察者的设备的情况下被验证,即,以设备无关(DI)方式,则可以保证各种量子信息任务的无条件安全性。在这项工作中,我们提出了一个实验友好的DI协议来证明纠缠的存在,基于Einstein-Podolsky-Rosen(EPR)转向。我们首先建立了DI验证框架,依赖于测量设备无关的技术和自测试,并表明它能够验证所有EPR可操纵状态。在三方测量设置的背景下,发现噪声鲁棒性对低效测量和不完善的自我测试。最后,一个四光子实验实现了设备独立验证EPR转向,即使贝尔本地状态。我们的工作为安全量子信息任务的现实实现铺平了道路。

英文摘要:

Entanglement lies at the heart of quantum mechanics, and has been identified an essential resource for diverse applications in quantum information. If entanglement could be verified without any trust in the devices of observers, i.e., in a device-independent (DI) way, then unconditional security can be guaranteed for various quantum information tasks. In this work, we propose an experimental-friendly DI protocol to certify the presence of entanglement, based on Einstein-Podolsky-Rosen (EPR) steering. We first establish the DI verification framework, relying on the measurement-device-independent technique and self-testing, and show it is able to verify all EPR-steerable states. In the context of three-measurement settings as per party, it is found to be noise robustness towards inefficient measurements and imperfect self-testing. Finally, a four-photon experiment is implemented to device-independently verify EPR-steering even for Bell local states. Our work paves the way for realistic implementations of secure quantum information tasks.

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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