从引力诱导纠缠推断量子化

IF 4.2 Q2 QUANTUM SCIENCE & TECHNOLOGY AVS quantum science Pub Date : 2022-06-01 DOI:10.1116/5.0101334
Vasileios Fragkos, M. Kopp, I. Pikovski
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引用次数: 23

摘要

低能量引力量子性质的可观测特征最近成为一个有前途的新研究领域。一个突出的途径是测试在空间叠加中制备的两个介观质量之间的引力诱导纠缠。在这里,我们分析了这些建议,以及从中可以推断出重力的量子性质以及这些测试的电磁类似物。我们表明,不可能得出关于介质的结论:即使在相对论物理学中,纠缠的产生也可以用介质或非局域过程来描述——相对论并不决定局域通道。因此,这种间接测试探测建立纠缠过程性质的能力有限,因为它们的解释本质上是模糊的。我们还表明,宇宙学观测已经证明了这些建议旨在测试的量子化的某些方面。尽管如此,拟议的实验将探索引力是如何由物质的空间叠加产生的,这是一个未经测试的量子物理学新领域。
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On inference of quantization from gravitationally induced entanglement
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.
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