Abstract
The atom fidelity is investigated in a system consisting of Mtwo-level atoms and M single-mode fields by use of complete quantum theory and numerical evaluation method. The influences of various system parameters on the evolution of atomic fidelity are studied. The results show that the atomic fidelity evolves in a Rabi oscillation manner. The oscillation frequency is mainly modulated by the coupling strength between atoms and light field, the atomic transition probabilities and the average photon numbers. Other factors hardly impact on the atomic fidelity. The present results may provide a useful approach to the maintenance of the atomic fidelity in the atom cavity field systems.
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Supported by the National Nature Science Foundation of China under Grant No. 11304230, Nature Science Foundation of Shaanxi Province under Grant No. 2013JM1006, the Project of Education Department of Shaanxi Provincial Government under Grant No. 2013JK0634, the Special Subject Construction of Weinan Normal University under Grant Nos. 14TSXK06 and 15ZRRC14