Parity-time symmetry-enhanced simultaneous magnon and photon blockade in cavity magnonic system

Abstract

Abstract In this work, we consider a parity-time ( P T ) symmetric cavity magnonic system involving the magnon–photon interaction with small magnon Kerr nonlinearity. Moreover, we investigate the effect of P T -symmetry phase on both the magnon and photon blockade. We show that the P T -symmetry phase, which is achievable by properly selecting the system parameters, can relax the large Kerr nonlinearity requirement for magnon blockade. Consequently, simultaneous perfect magnon and photon blockade can be easily obtained even in the presence of a small value of magnon Kerr nonlinearity. The outstanding feature of the selected scheme is the occurrence of simultaneous perfect magnon and photon blockade with only a small value of magnon Kerr nonlinearity. While photon blockade can be easily distinguished experimentally, the experimental realization of magnon statistics and consequently magnon blockade is still a challenge. The prominent feature of the P T -symmetric cavity magnonic system can relax this challenge by following the magnon blockade criteria via the photon statistics.