摘要
This paper presents an alternative scheme to realize the storage of entangled states for multiple trapped ions including W state, Bell states, and GHZ states even with ions which exchange vibrational energy with a heating surrounding, Our scheme requires that the ions be simultaneously excited by two laser beams with different frequencies. In this scheme the vibrational degrees of freedom are only regarded as intermediate states and the ions exchange energy via the mediation of the vibration of the vibrational mode in coupling processes. The scheme is insensitive to both the initial vibrational state and heating if the system remains in the Lamb Dicke regime. Since the effective Rabi frequency has a small dependence on the vibrational quantum number the heating will have no direct, effect on the internal state evolution.
基金
The project supported by the State Key Basic Research Development Program of China under Grant No. 20010B309310 and National Natural Science Foundation of China under Grant Nos, 60478029, 90103026, and 10125419,Acknowledgment We would like to thank Prof. Wu Ying for many enlightening discussions.
