Concentration for unknown atomic entangled states via cavity decay (3 pages)

Hong‐Fu Wang, Li-Li Sun, Shou Zhang +1 more

Grzegorz Chimczak

Liu Ye, Guang‐Can Guo

Zhuo‐Liang Cao, Lihua Zhang, Ming Yang

We present a physical scheme for entanglement concentration of unknown atomic entangled states via cavity decay. In the scheme, the atomic state is used as a stationary qubit and the photonic state as a flying qubit, and a close maximally entangled state can be obtained from pairs of partially entangled states probabilistically.

Xiaowei Zhang, Xiang Liu, Tang Xiao-Fang +1 more

We present a scheme for entanglement concentration of an unknown atomic non-maximally entangled GHZ state via cavity decay. In the scheme, the atom trapped in a cavity is manipulated by laser field, so the maximally entangled GHZ state can be obtained by performing certain operation, which can be realized by illuminating the atom in a cavity. Our method is robust against spontaneous atomic decay.

Zheng Zheng, Shi-Biao