I describe the work done in collaboration with A. Belenchia, F. Giacomini, E. Castro-Ruiz, C. Bruckner and M. Aspelmeyer that analyzes a gedanken experiment involving a massive body that is put into a quantum superposition. Remarkably, even for a nonrelativistic body, both vacuum fluctuations of the gravitational field and the quantization of gravitational radiation are essential in order to avoid inconsistencies. In addition, it is essential that the quantum body be viewed as entangled with its own Newtonian-like gravitational field in order to understand how the body may become entangled with other massive bodies via gravitational interactions.

中文翻译：

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大质量物体的量子叠加

我描述了与 A. Belenchia、F. Giacomini、E. Castro-Ruiz、C. Bruckner 和 M. Aspelmeyer 合作完成的工作，该工作分析了涉及一个大质量物体的 gedanken 实验，该大物体被置于量子叠加中。值得注意的是，即使对于非相对论的物体，引力场的真空涨落和引力辐射的量子化都是必不可少的，以避免不一致。此外，必须将量子体视为与其自身的类牛顿引力场纠缠，以了解量子体如何通过引力相互作用与其他大质量物体发生纠缠。