Acceleration noise constraints on gravity induced entanglement

TL;DR

This paper discusses the experimental challenges in observing gravity-induced entanglement, emphasizing the need to overcome acceleration noise limits that are more restrictive than previously considered, especially for similar-mass particles.

Contribution

It identifies fundamental acceleration noise limits for observing gravity-induced entanglement, highlighting the importance of noise suppression in experimental setups.

Findings

Acceleration noise limits are around tenths of femtometers per second squared per root Hertz for similar-mass particles.

Limits are less strict for unequal-mass particles, depending on collisional decoherence.

Strong noise suppression is necessary to experimentally detect gravity-induced entanglement.

Abstract

It has been proposed that quantum features of the gravitational field can be exposed experimentally by employing gravity as a mediator of entanglement. We show that in order to witness this type of entanglement experimentally, strong limits on acceleration noise, which has been neglected in previous work, must be overcome. In the case of two particles of similar mass, Casimir-Polder forces lead to a fundamental limit of tenths of femtometers per second squared per root Hertz. Limits are between three and six orders of magnitude less strict for two particles of unequal mass, depending on collisional decoherence.