Gravitational decoherence, alternative quantum theories and semiclassical gravity

摘要

In this report we discuss three aspects:1) Semiclassical gravity theory (SCG):4 levels of theories describing the interaction of quantum matter with classical gravity. 2) Alternative Quantum Theories:Discerning those which are derivable from general relativity (GR) plus quantum field theory (QFT) from those which are not 3) Gravitational Decoherence:derivation of a master equation and examination of the assumptions which led to the claims of observational possibilities. We list three sets of corresponding problems worthy of pursuit:a) Newton-Schr?dinger Equations in relation to SCG; b) Master equation of gravity-induced effects serving as discriminator of 2); and c) Role of gravity in macroscopic quantum phenomena.