Information content of the gravitational field of a quantum superposition
Information content of the gravitational field of a quantum superposition
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DOI：
10.1142/s0218271819430016
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发表时间：
2019-05
影响因子：
2.2
通讯作者：
A. Belenchia;R. Wald;F. Giacomini;Esteban Castro-Ruiz;vCaslav Brukner;M. Aspelmeyer
中科院分区：
文献类型：
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作者：
A. Belenchia;R. Wald;F. Giacomini;Esteban Castro-Ruiz;vCaslav Brukner;M. Aspelmeyer
当一个大质量的量子体被置于空间叠加态时，考虑由该体产生的引力场的量子方面是很有趣的。我们认为，为了理解物体如何通过引力相互作用与其他大质量物体纠缠，它必须被认为是与自己的牛顿引力场纠缠在一起。因此，类牛顿引力场必须能够携带量子信息。我们的分析支持这样一种观点，即测试通过引力相互作用的系统的纠缠的桌面实验确实探测了引力的量子性质，即使在实验期间没有发射“引力子”。
When a massive quantum body is put into a spatial superposition, it is of interest to consider the quantum aspects of the gravitational field sourced by the body. We argue that in order to understand how the body may become entangled with other massive bodies via gravitational interactions, it must be thought of as being entangled with its own Newtonian-like gravitational field. Thus, a Newtonian-like gravitational field must be capable of carrying quantum information. Our analysis supports the view that table-top experiments testing entanglement of systems interacting via gravity do probe the quantum nature of gravity, even if no “gravitons” are emitted during the experiment.