1 March 2021

Space Science at Droptower SEMINAR TALK

Location: ZARM Bremen - Online seminar
When: 1.3.2021, 17:00 CET - Online

Speaker: Alessio Belenchia (University of Tübingen)

Title: Quantum Superposition of Massive Objects and the Quantization of Gravity

Abstract: 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. In this talk, I will discuss a Gedankenexperiment where Alice and Bob control masses in quantum superposition. I will show that the analysis of this experiment does not lead to any inconsistency provided the gravitational radiation is quantized and that vacuum fluctuations limit the localization of a particle to no better than a Planck length. This provides support for the view that (linearized) gravity should have a quantum field description and 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.