Progress in constraining axion and non-Newtonian gravity from the Casimir effect

TL;DR

This paper reviews recent advances in using Casimir effect measurements to set tighter constraints on axion-like particles and non-Newtonian gravity, highlighting new experiments that significantly improve existing bounds.

Contribution

It presents new experimental results that strengthen constraints on axion-nucleon couplings and Yukawa corrections, and proposes future experiments to further improve these limits.

Findings

Constraints on axion-like particles improved by factors of 60.

Yukawa-type correction constraints improved by factors of 1000.

Proposed new experiments to further tighten these bounds.

Abstract

We consider recent progress in constraining the axion-nucleon coupling constants and the Yukawa-type corrections to Newtonian gravity from experiments on measuring the Casimir interaction. After a brief review of previously obtained constraints, we concentrate on the new Casimir-less experiment, which allows to strengthen the known results up to factors of 60 and 1000 for the axion-like particles and Yukawa-type corrections, respectively. We also discuss possibilities allowing to further strengthen the constraints on axion-nucleon coupling constants, and propose a new experiment aiming to achieve this goal.