Observing quantum nonlocality in the entanglement between modes of massive particles
Observing quantum nonlocality in the entanglement between modes of massive particles
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DOI：
10.1103/physreva.75.022108
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发表时间：
2007-02-01
影响因子：
2.9
通讯作者：
Nori, Franco
中科院分区：
文献类型：
--
作者：
Ashhab, S.;Maruyama, Koji;Nori, Franco
我们考虑的问题是，是否有可能使用大质量粒子的空间分离模式之间的纠缠来观察非局域量子关联。模式纠缠可以使用单个粒子获得，这表明在得出实验观察结果之前需要仔细考虑，贝尔不等式的违反是可能的或不可能的。在类似于光学实验的最简单的设置中，基本守恒定律禁止这种观察。然而，我们表明，使用辅助粒子，模式纠缠可以转换成允许观察量子非局域性的形式。成功转化的概率取决于所用辅助粒子的性质和数量。特别是，我们发现，一个辅助玻色-爱因斯坦凝聚允许转换任意多次与一个小的误差，只取决于初始状态的凝聚。
We consider the question of whether it is possible to use the entanglement between spatially separated modes of massive particles to observe nonlocal quantum correlations. Mode entanglement can be obtained using a single particle, indicating that it requires careful consideration before concluding whether experimental observation-e.g., violation of Bell inequalities-is possible or not. In the simplest setups analogous to optics experiments, that observation is prohibited by fundamental conservation laws. However, we show that using auxiliary particles, mode entanglement can be converted into forms that allow the observation of quantum nonlocality. The probability of successful conversion depends on the nature and number of auxiliary particles used. In particular, we find that an auxiliary Bose-Einstein condensate allows the conversion arbitrarily many times with a small error that depends only on the initial state of the condensate.