a proposal for bad-cavity optomechanical ground-state cooling via coupling to a parity-time symmetric cavity

in this paper a ground-state cooling method for bad optomechanical systems is proposed. previous authors show that an optical cavity with equal loss and gain has a parity-time reversal (pt) symmetry. we introduced an optomechanical cavity coupled to the two modes of a pt symmetry and a passive optical cavity. a quarter-wave plate provides linear mixing interaction between the pt symmetry and passive cavities. in this study, our proposed system improved the cooling rate by utilizing two effects: energy localization and quantum interference. these two impacts increase the cooling rate while the system is red or blue-detuned. it is demonstrated that optomechanical cooling occurs in both the bad-cavity limit and the weak optomechanical coupling regime. these innovations can be attained by parameter management of the system.