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arXiv 1005.3435quant-phcond-mat.supr-con
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弱测量下Bell不等式在时间上的实验破坏

Experimental violation of a Bell's inequality in time with weak measurement

Agustin Palacios-Laloy, François Mallet, François Nguyen, Patrice Bertet, Denis Vion, Daniel Esteve, Alexander Korotkov

摘要:

两个纠缠且空间分离的量子二能级系统(TLS)违反J.Bell不等式通常被认为是自然界不服从的最突出的证明。地方现实主义?根据不同但相关的假设“宏观现实主义”,合理的宏观系统,莱格特和加格推导出一个类似的不等式的一个单一的自由度进行相干振荡,并在连续的时间测量。这样的“贝尔时间不等式”,这应该是违反了量子TLS,在这里测试。在这项工作中,TLS是一个超导量子线路,其拉比振荡被连续驱动,而它是连续和弱测量。检测器输出端的时间相关性符合量子力学的预测,并以5个标准差违反了不等式。

英文摘要:

The violation of J. Bell's inequality with two entangled and spatially separated quantum two- level systems (TLS) is often considered as the most prominent demonstration that nature does not obey ?local realism?. Under different but related assumptions of "macrorealism", plausible for macroscopic systems, Leggett and Garg derived a similar inequality for a single degree of freedom undergoing coherent oscillations and being measured at successive times. Such a "Bell's inequality in time", which should be violated by a quantum TLS, is tested here. In this work, the TLS is a superconducting quantum circuit whose Rabi oscillations are continuously driven while it is continuously and weakly measured. The time correlations present at the detector output agree with quantum-mechanical predictions and violate the inequality by 5 standard deviations.

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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