Experiments towards the Quantum Nature of Gravity and the Related Theoretical Challenges

Tomohiro Fujita

Quantum gravity is one of the most outstanding problems in physics. In fact, we do not know if
gravity should be quantized in a similar way to the other degree of freedoms. Recently, a couple
of experiments are proposed to test whether gravitational fields become quantum superposition or not.
After the proposal, a number of questions are raised and the possible implications of the experiments
are under discussion. I will introduce the proposed experiments and the related questions
and hope to specify the remaining theoretical challenges to clarify the implications.

[1] Phys.Rev.Lett. 119 (2017) 24, 240401 [1707.06050]
[2] Phys.Rev.Lett. 119 (2017) 24, 240402 [1707.06036]
[3] Phys.Lett.B 792 (2019) 64-68 [1808.05842]
[4] arXiv: 2005.14596

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Last-modified: 2020-06-22 (月) 15:34:39 (22d)