# Zero Casimir Force in Axion Electrodynamics and the Search for a New Force

## TL;DR

This paper proposes a stable metal plate configuration in axion electrodynamics where the Casimir force vanishes, using Weyl semimetals, to aid in detecting axion-like particles and new forces at microscopic scales.

## Contribution

It introduces a novel stable setup with zero Casimir force in axion electrodynamics, facilitating experimental searches for axion-like particles.

## Key findings

- Identified a stable configuration with zero Casimir force in axion electrodynamics.
- Proposed a practical setup using Weyl semimetals for experimental detection.
- Potential to improve sensitivity in searches for new light particles.

## Abstract

We point out that there is a stable configuration of metal plates where the Casimir force is vanishing in axion electrodynamics. We consider a concrete setup involving Weyl semimetals, which hosts an axion-like effect on the electromagnetism, towards the measurement of the axionic effect on the Casimir force. Our setup realizes zero Casimir force between metals and may be useful for the search for new force mediated by light particles at the micrometer scale.