Detecting Acceleration-Enhanced Vacuum Fluctuations with Atoms Inside a Cavity

TL;DR

This paper proposes an experimental setup using a rotating atom inside a cavity to detect acceleration-enhanced vacuum fluctuations, potentially observing effects like the Unruh effect with current technology.

Contribution

It introduces a novel optomechanical method to observe acceleration-induced quantum fluctuations and particle creation in a laboratory setting.

Findings

Enhanced emission rate of excited atoms under rotation.

Spectral shifts due to modified quantum correlations.

Feasible experimental proposal with existing technology.

Abstract

Some of the most prominent theoretical predictions of modern times, e.g., the Unruh effect, Hawking radiation, and gravity-assisted particle creation, are supported by the fact that various quantum constructs like particle content and vacuum fluctuations of a quantum field are observer-dependent. Despite being fundamental in nature, these predictions have not yet been experimentally verified because one needs extremely strong gravity (or acceleration) to bring them within the existing experimental resolution. In this Letter, we demonstrate that a post-Newtonian rotating atom inside a far-detuned cavity experiences strongly modified quantum fluctuations in the inertial vacuum. As a result, the emission rate of an excited atom gets enhanced significantly along with a shift in the emission spectrum due to the change in the quantum correlation under rotation. We propose an optomechanical setup that is capable of realizing such acceleration-induced particle creation with current technology. This provides a novel and potentially feasible experimental proposal for the direct detection of noninertial quantum field theoretic effects.