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Acta Physica Sinica

INFLUENCE OF THE VIRTUAL PHOTON FIELD ON THE ATOMIC QUANTUM CHARACTER IN TWO-MODE SQUEEZING VACUUM FIELD

HUANG CHUN-JIA, Ming Tao Zhou, Jiangfan Li, Fang Jia-Yuan, Huang Zu-hong, He Hui-Yong, 长沙电力学院物理与信息工程系，长沙 410077

Published Jan 1, 2000• 0 citations
Publisher

Abstract

We have investigated in the time-evolution and the squeezing character of atomic operators in a system of two-mode squeezed vacuum field interacting with a two-level atom without the rotating-wave approximation by means of quantum theory.The results obtained using the numerical method indicate that the influence of the virtual-photon field on the atomic quantum character is mainly the cause for quantum chaos which is related to the quantum character of the system itself.

DOI
10.7498/aps.49.1490

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We have investigated in the time-evolution and the squeezing character of atomic operators in a system of two-mode squeezed vacuum field interacting with a two-level atom without the rotating-wave approximation by means of quantum theory.The results obtained using the numerical method indicate that the influence of the virtual-photon field on the atomic quantum character is mainly the cause for quantum chaos which is related to the quantum character of the system itself.
The statistic properties of photons in a system of two-mode squeezed vacuum field interacting with a two-level atom are studied without the rotating-wave approximation by means of quantum theory, and the influence of the virtual-photon process on the statistic properties of photons is discussed emphatically. The results obtained using a numerical method indicate that the influence of the virtual-photon process on the statistic properties of photons qives rise to quantum chaos, that is related to the initial state parameters of the system.
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In this paper, we investigate the time evolution of the atomic operators of a two-level atom interacting with the field via a two-photon process within and without the rotating-wave approximation (RWA) by means of non-relativestic QED. We also verified that the virtual photon field is the cause for quantum chaos embodied by the periodic decay and revival effect of the atom using the numerical and analytic methods, and discussed the reason of neglecting the in-fluence of the virtual photon field on the revival time.