Fidelity of quantum states for V-type three-level atom interacting with the two-mode odd-even entangled coherent field

Abstract

Abstract:

The evolution characteristics of the fidelity of quantum states for a V-type three-level atom interacting with the two-mode odd-even entangled coherent field are investigated. The influences of the detuning parameter, the two-mode light field intensity and the atomic distribution angle on the fidelity of quantum states are discussed by using numerical calculations. The results show that the nature of fidelity for the atom is better than that for the system and the field, the increasing of the detuning parameter or the initial field intensity can be a good help for the increasing of the fidelity of the atom, and it is much better when the atom is initially in the ground state. The evolution frequencies of the fidelities are modulated by the detuning parameter. They show quantum collapse and revival behaviors when the two-mode light field intensity is strong enough.

Key words: quantum optics, fidelity of quantum states, V type three-level atom, two-mode odd-even entangled coherent field

CLC Number:

O431.2

ZOU Yan. Fidelity of quantum states for V-type three-level atom interacting with the two-mode odd-even entangled coherent field[J]. J4, 2009, 26(3): 320-326.

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