摘要
We propose a scheme for generation of SU（2） coherent states for an atomic ensemble and a cavity mode. In the scheme a collection of two-level atoms resonantly interact with a single-mode quantized field. Under certain conditions, the system can evolve from a Fock state to a highly entangled SU（2） coherent state. The operation speed increases as the number of atoms increases, which is important in view of deeoherence.
基金
supported by the National Natural Science Foundation of China under Grant No.10674025
the Doctoral Foundation of the Ministry of Education of China under Grant No.20070386002
