Quantum Entanglement and Axion Physics

TL;DR

This paper explores how axions, proposed dark matter particles, can be detected through their effect on entangled photon polarization correlations in magnetic fields, providing a novel experimental signature.

Contribution

It introduces a new method to detect axions by analyzing their coupling to entangled photon pairs and how magnetic fields influence their polarization correlations.

Findings

Magnetic fields alter polarization correlations of entangled photons in the presence of axions.

The proposed method offers an unambiguous signature for axion detection.

Potential to improve axion search sensitivity using quantum entanglement techniques.

Abstract

The axion particle is the outcome of the proposed Peccei-Quinn mechanism for solving the strong CP problem. Axion is also a popular dark matter candidate. Thus there is an increased interest in establishing its existence. Axions couple to two photons and most experiments search for the transition of an axion into a photon, in the presence of a magnetic field. In our study we examine the coupling of the axion into a pair of entangled photons. The presence of a magnetic field changes the polarization correlations of the entagled photons, thus offering an unambiguous signature for axion existence