An underlying theory for gravity

7th International Conference on Gravitation and Cosmology

Ha, Y.K.^1

Department of Physics, Temple University, Philadelphia, PA 19122, United States^1

关键词: Classical gravity;    Quantum gravity;    Quantum nature;    Spacetime;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/484/1/012061/pdf
DOI  :  10.1088/1742-6596/484/1/012061

来源: IOP

【 摘 要 】

A new direction to understand gravity has recently been explored by considering classical gravity to be a derived interaction from an underlying theory. This underlying theory would involve new degrees of freedom at a deeper level, and it would be structurally different from classical gravitation. It may conceivably be a quantum theory or a non-quantum theory. The relation between this underlying theory and Einstein's gravity is similar to the connection between statistical mechanics and thermodynamics. We discuss the apparent lack of evidence of any quantum nature of spacetime and the meaning of quantum gravity in this context.