Direct conversion of a four-atom W state to a Greenberger-Horne-Zeilinger state via a dissipative process
Jie Song, Xiudong Sun, Qing-Xia Mu, Lingli Zhang, Yan Xia, He‐Shan Song · Physical Review A · 2013
We consider an open quantum system consisting of four atoms which are placed in a damped cavity. Through a dissipative dynamics process, a $W$ state can be converted into a Greenberger-Horne-Zeilinger state with deterministic probability. In addition, the interaction time need not be controlled strictly in the dynamics process. The protocol may open up a promising perspective for quantum state conversion between different classes of entanglement and cavity quantum electrodynamics systems.