Dissipative preparation of multibody entanglement via quantum feedback control

摘要

We investigate the generation of a multibody Dicke state in a coupled cavity system subject to environmentalnnoise. Based on quantum feedback control, cavity decay may play a constructive role in obtaining the intendednstate. The required interaction time need not be accurately controlled. In addition, the feedback operations arenonly applied to a single atom in one cavity during the whole evolution process, and it is not necessary to changenthe control strategy as the number of atoms increases. Thus, our proposal can exploit the core advantage ofncoupled cavities to implement a scalable control scheme for preparing multibody entanglement.