线性化量子引力中的局域介导纠缠
Locally mediated entanglement in linearised quantum gravity
AI总结：
本文从线性化量子广义相对论出发，在保持洛伦兹不变性的路径积分框架下推导引力介导的纠缠，证明其量子本质，并提出观测延迟纠缠的可能性。
摘要：
当前对实验室探测引力介导纠缠的兴趣源于一个信息论论证：由局域场介导的纠缠证明该场不是经典的。此前对该效应的推导将引力建模为瞬时作用；本文利用路径积分形式，从线性化量子广义相对论推导该效应，同时明确保持洛伦兹不变性。在该框架下，纠缠明确由场的量子特性介导。我们还指出观测延迟纠缠的可能性，这种延迟纠缠无法用瞬时相互作用解释。这对引力而言是一项困难的实验，但在类似的电磁情形中是可行的。
英文摘要：
The current interest in laboratory detection of entanglement mediated by gravity was sparked by an information--theoretic argument: entanglement mediated by a local field certifies that the field is not classical. Previous derivations of the effect modelled gravity as instantaneous; here we derive it from linearised quantum general relativity while keeping Lorentz invariance explicit, using the path integral formalism. In this framework, entanglement is clearly mediated by a quantum feature of the field. We also point out the possibility of observing retarded entanglement, which cannot be explained by an instantaneous interaction. This is a difficult experiment for gravity, but is plausible for the analogous electromagnetic case.
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