Unruh effect for interacting particles with ultracold atoms

TL;DR

This paper proposes an experimental setup using ultracold fermions in optical lattices to observe the Unruh effect, revealing novel phenomena like statistics inversion and offering new avenues for quantum gravity simulation.

Contribution

It introduces a method to realize the Unruh effect with interacting ultracold atoms and explores the resulting quantum phenomena in a controllable laboratory setting.

Findings

Observation of statistics inversion in low-lying excitations

Demonstration of vacuum acceleration effects in optical lattices

Potential for quantum gravity simulation with ultracold atoms

Abstract

The Unruh effect is a quantum relativistic effect where the accelerated observer perceives the vacuum as a thermal state. Here we propose the experimental realization of the Unruh effect for interacting ultracold fermions in optical lattices by a sudden quench resulting in vacuum acceleration with varying interactions strengths in the real temperature background. We observe the inversion of statistics for the low lying excitations in the Wightman function as a result of competition between the spacetime and BCS Bogoliubov transformations. This paper opens up new perspectives for simulators of quantum gravity.