Vacuum Rabi Oscillation of an Atom without Rotating-Wave Approximation
WANG Fa-Qiang, LIU Wei-Ci, LIANG Rui-Sheng
Lab of Photonic Information Technology, School of Information and Photoelectronic Science and Engineering, South China Normal University, Guangzhou 510006
Vacuum Rabi Oscillation of an Atom without Rotating-Wave Approximation
WANG Fa-Qiang, LIU Wei-Ci, LIANG Rui-Sheng
Lab of Photonic Information Technology, School of Information and Photoelectronic Science and Engineering, South China Normal University, Guangzhou 510006
We have investigated vacuum Rabi oscillation of an atom coupled with single-mode cavity field exactly, and compared the results with that of the Jaynes--Cummings (J-C) model. The results show that for resonant case, there is no Rabi oscillation for an atom. For small detuning and weak coupling case, the probability for the atom in excited state oscillates against time with different frequencies and amplitudes from that of the J-C model. It exhibits that the counter-rotating wave interaction could significantly effect the dynamic behaviour of the atom, even under the condition in which the RWA is considered to be justified.
We have investigated vacuum Rabi oscillation of an atom coupled with single-mode cavity field exactly, and compared the results with that of the Jaynes--Cummings (J-C) model. The results show that for resonant case, there is no Rabi oscillation for an atom. For small detuning and weak coupling case, the probability for the atom in excited state oscillates against time with different frequencies and amplitudes from that of the J-C model. It exhibits that the counter-rotating wave interaction could significantly effect the dynamic behaviour of the atom, even under the condition in which the RWA is considered to be justified.
(Quantum fluctuations, quantum noise, and quantum jumps)
引用本文:
WANG Fa-Qiang;LIU Wei-Ci;LIANG Rui-Sheng. Vacuum Rabi Oscillation of an Atom without Rotating-Wave Approximation[J]. 中国物理快报, 2008, 25(12): 4270-4272.
WANG Fa-Qiang, LIU Wei-Ci, LIANG Rui-Sheng. Vacuum Rabi Oscillation of an Atom without Rotating-Wave Approximation. Chin. Phys. Lett., 2008, 25(12): 4270-4272.
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2008, Vol. 25 
