Fidelities of quantum states in intensity-dependent Jaynes-Cummings model

Based on the quantum theory and numerical calculation,the fidelities of quantum states were investigated in intensity-dependent Jaynes-Cummings model containing atomic motion under the interaction of coherent field.The analytical expressions of the fidelities of quantum states were derived and simulation results were obtained.In addition,the influence of atomic motion and the field mode structure on the fidelities of quantum states of the system in different atomic initial states was discussed.The results indicate that both the atomic motion and the field mode structure can modulate the fidelities of quantum states in the system of interaction.The greater the velocities of atomic motion,the higher the fidelities of the three systems are.On the other hand,the larger the field mode structures,the higher fidelity of the three systems.The results are meaningful for the development of quantum communication and quantum calculation.