Aharon Brodutch, Institute for Quantum Computing
Our fundamental understanding of the physical universe is governed by
two theories, quantum mechanics and general relativity. While there is
no unified theory of quantum gravity, the two fundamental theories
`peacefully coexist' in all experimentally feasible scenarios.
Nevertheless there are very few situations where both quantum and
general relativistic effects can be probed simultaneously. Experiments
involving photons are the most promising candidates for near-future
measurements that involve both theories. Recent progress towards
quantum optics satellite experiments, such as Quantum Encryption and Science Satellite (QEYSSat), are a step up towards measurements of post-Newtonian effects on quantum objects. In light of these possibilities we need to carefully examine the various effects that may be detectable in a realistic experiment. Possible results of such experiments include corrections to post-Newtonian parameters, tests of the equivalence principle, and experimental insights about the interaction between quantum mechanical objects and gravity.