Quantum Properties of Binomial State Field Interacting with the Cascade Three-Level Atom

Abstract

Abstract: The energy spectrum and second-order coherence degree of a cascade three-level atom interacting with a single mode binomial state field were calculated exactly in the non-rotating wave approximation. The level-crossing problem was discussed by using fidelity. The influences of the binomial state fields parameter η and the superposition of atomic energy levels at the initial time on the second-order coherence degree were studied. The results indicate that the duration of the bunching effect decreases gradually with the increase of light field parameter η . The duration of the light field present antibunching effect decreases due to the atom in the superposition state. Whether the atom is in superposition state at the beginning time, the light field displays antibunching effect completely when the value of η is big enough. Because of the virtual photon effect induced by non-rotating wave approximation, the little indentation oscillation appeared in the second-order coherence degree evolution curves.

Key words: quantum optics, energy spectrum, fidelity, antibunching effect, non-rotating wave approximation

CLC Number:

O431.2

CONG Honglu, ZHAO Yuna, CHEN Lei, WANG Linjie, REN Xuezao . Quantum Properties of Binomial State Field Interacting with the Cascade Three-Level Atom[J]. Chinese Journal of Quantum Electronics, 2020, 37(1): 76-82.

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