标题： 从引力诱导的纠缠中推断量化 显示英文标题

标题： On inference of quantization from gravitationally induced entanglement

摘要： 低能区引力量子化的可观测特征最近成为了一个有前景的新研究领域。 一个显著的方向是检验两个处于空间叠加态的介观质量之间是否存在引力诱导纠缠。 在这里我们分析了此类提议以及从中可以推断出关于引力量子化性质的信息，同时也探讨了此类测试的电磁学类比。 我们表明无法得出关于媒介物的结论：即使是在相对论物理学中，纠缠生成也可以同样用媒介物来描述，或者用非局域过程来描述——相对论并不规定一个局部信道。 因此，这些间接测试探测量子化过程的本质的能力有限，因为它们的解释本质上存在模糊性。 我们还表明，宇宙学观测已经展示了这些提议旨在测试的一些量化特征。 尽管如此，所提出的实验将探测物质的空间叠加如何源引引力，这是量子物理的一个未经测试的新领域。 显示英文摘要

摘要： Observable signatures of the quantum nature of gravity at low energies have recently emerged as a promising new research field. One prominent avenue is to test for gravitationally induced entanglement between two mesoscopic masses prepared in spatial superposition. Here we analyze such proposals and what one can infer from them about the quantum nature of gravity, as well as the electromagnetic analogues of such tests. We show that it is not possible to draw conclusions about mediators: even within relativistic physics, entanglement generation can equally be described in terms of mediators or in terms of non-local processes -- relativity does not dictate a local channel. Such indirect tests therefore have limited ability to probe the nature of the process establishing the entanglement as their interpretation is inherently ambiguous. We also show that cosmological observations already demonstrate some aspects of quantization that these proposals aim to test. Nevertheless, the proposed experiments would probe how gravity is sourced by spatial superpositions of matter, an untested new regime of quantum physics.