Quantum entanglement and axion physics

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