# Prospects for Searching Thermal Effects, Non-Newtonian Gravity and Axion-Like Particles: Cannex Test of the Quantum Vacuum

## TL;DR

The paper discusses the CANNEX experiment's potential to improve constraints on non-Newtonian gravity, axion-like particles, and dark energy models through enhanced measurements of the Casimir effect.

## Contribution

It proposes a modified measurement scheme for the CANNEX experiment to simultaneously measure Casimir pressure and its gradient, improving sensitivity to new physics.

## Key findings

- Potential to strengthen Yukawa interaction constraints by up to tenfold.
- Enhanced limits on axion-nucleon coupling constants for axion masses 1-100 meV.
- Feasibility of using the modified setup for better dark energy parameter constraints.

## Abstract

We consider the CANNEX (Casimir And Non-Newtonian force EXperiment) test of the quantum vacuum intended for measuring the gradient of the Casimir pressure between two flat parallel plates at large separations and constraining parameters of the chameleon model of dark energy in cosmology. A modification of the measurement scheme is proposed that allows simultaneous measurements of both the Casimir pressure and its gradient in one experiment. It is shown that with several improvements the CANNEX test will be capable to strengthen the constraints on the parameters of the Yukawa-type interaction by up to an order of magnitude over a wide interaction range. The constraints on the coupling constants between nucleons and axion-like particles, which are considered as the most probable constituents of dark matter, could also be strengthened over a region of axion masses from 1 to 100 meV.