Dissipative preparation of three-atom entanglement state via quantum feedback control

摘要

Two schemes are presented for generating steady three-atom Greenberger-Horne-Zeilinger and W states in a strongly dissipative cavity via quantum feedback control. The quantum feedback control is only applied to a single atom based on quantum-jump detection to improve the fidelity of the target state. Thus, cavity decay plays a key role in obtaining the target state. The required interaction time need not be accurately controlled. (C) 2015 Optical Society of America