Chiara Marletto and Vlatko Vedral developed a quantum-information route to testing gravity without detecting an individual graviton. Their proposal uses quantum entanglement between two initially independent masses to witness nonclassical properties of the interaction mediating it.[ref]
Gravitationally-induced entanglement between two massive particles is sufficient evidence of quantum effects in gravity by Chiara Marletto and Vlatko Vedral. General mediator argument and proposed two-mass experiment
The experimental question is stronger than measuring a gravitational phase shift alone. It requires establishing the appropriate quantum entanglement and controlling alternative couplings. The inference concerns the mediator under the stated assumptions, rather than uniquely selecting a complete microscopic theory of gravity.
Articles by others on the same topic
Chiara Marletto is a theoretical physicist and researcher known for her work in the fields of quantum information theory and the foundations of quantum mechanics. She is a member of the Department of Atomic and Laser Physics at the University of Oxford and has contributed to the development of new theoretical frameworks for understanding quantum phenomena.