Observation of Quantum Beat in Rb by Parametric Four-Wave Mixing
ZHU Chang-Jun1, HE Jun-Fang2, XUE Bing1, ZHAI Xue-Jun1
1Department of Physics, School of Science, Xi'an Polytechnic University, Xi'an 7100482State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119
Observation of Quantum Beat in Rb by Parametric Four-Wave Mixing
1Department of Physics, School of Science, Xi'an Polytechnic University, Xi'an 7100482State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119
摘要Two coupled parametric four-wave-mixing processes in Rb atoms are studied using perturbation theory, which reveals clear evidence of the appearance of quantum beat at 608cm-1, corresponding to the energy difference of the 7s-5d states of Rb atoms, in the parametric four-wave-mixing signals. A pump--probe technique is utilized to observe the quantum beat. Time-varying characteristics of the quantum beat are investigated using time-dependent Fourier transform. The results show that the time-varying characteristics of the quantum beat not only offers a sensitive detecting method for observing the decay of atomic wave packets, but also provides a potential tool for monitoring the dissociation of molecules.
Abstract：Two coupled parametric four-wave-mixing processes in Rb atoms are studied using perturbation theory, which reveals clear evidence of the appearance of quantum beat at 608cm-1, corresponding to the energy difference of the 7s-5d states of Rb atoms, in the parametric four-wave-mixing signals. A pump--probe technique is utilized to observe the quantum beat. Time-varying characteristics of the quantum beat are investigated using time-dependent Fourier transform. The results show that the time-varying characteristics of the quantum beat not only offers a sensitive detecting method for observing the decay of atomic wave packets, but also provides a potential tool for monitoring the dissociation of molecules.
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2007, Vol. 24 
