Is Quantum Gravity Necessary?

Details Is Quantum Gravity Necessary? Is Quantum Gravity Necessary?

2008-03-24

arxiv.org/abs/0803.3456v1

Class.Quant.Grav.25:154010,2008

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

based on a talk given at Peyresq Physics 11, to appear in Class. Quant. Grav

Scientific paper

10.1088/0264-9381/25/15/154010

In view of the enormous difficulties we seem to face in quantizing general relativity, we should perhaps consider the possibility that gravity is a fundamentally classical interaction. Theoretical arguments against such mixed classical-quantum models are strong, but not conclusive, and the question is ultimately one for experiment. I review some work in progress on the possibility of experimental tests, exploiting the nonlinearity of the classical-quantum coupling, that could help settle this question.

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