Gravitational Decoherence in Deep Space Experiments

TL;DR

This paper discusses the importance of gravitational decoherence experiments in space, which can reveal fundamental insights about gravity's nature and test quantum theories in curved spacetime.

Contribution

It highlights the potential of space-based experiments to distinguish between quantum field theory and alternative quantum models regarding gravity.

Findings

Gravitational decoherence experiments can differentiate between fundamental and effective gravity.

Space experiments can test predictions of quantum field theory in curved spacetime.

Results can inform the fundamental nature of gravity.

Abstract

Among the many worthwhile quantum experiments taking advantage of long baselines in space, this white paper points to the far-reaching significance of gravitational decoherence experiments. These experiments can provide clues as to whether gravity is of a fundamental or an effective nature. They can also discriminate between the predictions of quantum field theory in curved spacetime, our default theory for quantum phenomena in background gravitational fields, and other popular alternative quantum theories.