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arXiv 1507.06231quant-ph
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局部模型对Clauser-Horne/Eberhard不等式的破坏

Clauser-Horne/Eberhard inequality violation by a local model

Donald A. Graft

摘要:

由于Clauser-Horne/Eberhard不等式不受检测漏洞的影响,它在局域性检验和基于纠缠的量子信息协议的认证中发挥着重要作用。我描述了一个本地模型,违反了不平等使用一个合理的机制依赖于设备的参数,源排放率。该效应是通过使用标准窗口符合计数方法分析时间标记数据而产生的。值得注意的是,这里的检测时间不是测量设置的函数,即,公平巧合假设得到满足。这一发现对实验的设计和解释以及量子信息协议具有影响,因为它表明,通过证明检测时间和设置的独立性,不能消除符合窗口机制。本文描述了一种可靠的符合计数方法,并表明它提供了一个准确的计数真正的符合。最近的实验测试本地现实主义的基础上Clauser-Horne/Eberhard不等式被认为是,它表明,在一种情况下(Christensen等人),排放率被适当地限制以确保有效的计数,并且数据支持局部性;在第二种情况下(Giustina等人)实验忽略了适当地限制发射速率,并且可以局部地解释所声称的违反。

英文摘要:

Thanks to its immunity to the detection loophole, the Clauser-Horne/Eberhard inequality plays an important role in tests of locality and in certification of quantum information protocols based on entanglement. I describe a local model that violates the inequality using a plausible mechanism relying upon a parameter of the apparatus, the source emission rate. The effect is generated through the analysis of time-tagged data using a standard windowed coincidence counting method. Significantly, the detection times here are not functions of the measurement settings, i.e., the fair coincidences assumption is satisfied. This finding has implications for the design and interpretation of experiments and for quantum information protocols, as it shows that the coincidence window mechanism cannot be eliminated by a demonstration of independence of the detection times and settings. The paper describes a reliable coincidence counting method and shows that it delivers an accurate count of true coincidences. Recent experimental tests of local realism based on the Clauser-Horne/Eberhard inequality are considered and it is shown that in one case (Christensen et al.) the emission rate is appropriately limited to ensure valid counting, and the data supports locality; in a second case (Giustina et al.) the experiment neglects to appropriately limit the emission rate, and the claimed violation can be accounted for locally.

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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