Detecting mode entanglement: The role of coherent states, superselection rules, and particle statistics
Detecting mode entanglement: The role of coherent states, superselection rules, and particle statistics
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DOI：
10.1103/physreva.76.052113
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发表时间：
2007-11-01
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
我们讨论了利用所谓的模纠缠来观测量子非定域性的可能性，并在此背景下分析了不同类型粒子之间的差异。我们首先讨论了相干态在这类实验中的作用，并评论了自然界中相干态的存在。相干态的讨论自然引发了粒子统计在这个问题上的作用的问题。虽然泡利不相容原理排除了含有大量费米子粒子的相干态，但我们发现，对于这个问题，可以使用大量的费米子相干态，每个相干态最多包含一个粒子，以达到与玻色相干态相同的效果。超选择规则的讨论自然是在这种背景下产生的，因为它们对给定情况的适用性禁止使用相干态。这一限制特别影响了我们提出的用于探测费米子粒子的模式纠缠的场景。
We discuss the possibility of observing quantum nonlocality using the so-called mode entanglement, analyzing the differences between different types of particles in this context. We first discuss the role of coherent states in such experiments, and we comment on the existence of coherent states in nature. The discussion of coherent states naturally raises questions about the role of particle statistics in this problem. Although the Pauli exclusion principle precludes coherent states with a large number of fermionic particles, we find that a large number of fermionic coherent states, each containing at most one particle, can be used to achieve the same effect as a bosonic coherent state for the purposes of this problem. The discussion of superselection rules arises naturally in this context, because their applicability to a given situation prohibits the use of coherent states. This limitation particularly affects the scenario that we propose for detecting the mode entanglement of fermionic particles.