Mass-Independent Gravitationally Induced Entanglement

by Mr. Lorenzo Braccini

University College London

at Quantum optics seminar

Wed, 25 Mar 2026, 16:00
Zoom only

Abstract

Zoom Link: https://us02web.zoom.us/j/83766788278?pwd=KqanrSqEOe1tBJ1b9lsZDs3R8HdQHM.1

Abstract:
Operator-valued forces between a qubit and a nanoparticle can be exploited to create a non-Gaussian state of matter, which may be used to sense the small entanglement mediated by gravity. From a semi-classical argument (Newton's laws), given a force and a potential, the superposition is inversely proportional to the mass. Thus, the leading-order entangling phase induced by the Newtonian potential (quadratic in both the mass and the superposition size) is found to be mass-independent, for a variety of protocols. This argument is further supported by the analytical treatment of the time evolution of the wave function of the joint system, including the qubits and the continuous variables describing the nanoparticle centre-of-mass degrees of freedom. Gaussian noise is discussed at the level of master equations.

Created on 22-03-2026 by Folman, Ron (folman)
Updaded on 22-03-2026 by Folman, Ron (folman)