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Nonlinear responses of degenerate two-level systems to intense few-cycle pulses
Kuninobu Nagaya1, Chaoyuan Zhu, Sheng Hsien Lin
1Institute of Atomic and Molecular Sciences, Academia Sinica, P.O. Box 23-166, Taipei 106, Taiwan. kuninobu.nagaya@st-systems.co.jp
Abstract:
Population transfers in degenerate (or almost degenerate) two-level systems interacting with the few-cycle laser pulse are investigated. A simple and analytical formula of nonadiabatic transition probability is derived with completely degenerate condition, demonstrating the sensitive dependence of the transition probability on the phase of the few-cycle pulses. As one of the applications of this formula, a new way of controlling the nuclear wave packet dynamics at a potential curve crossing by 1 cycle laser pulse is proposed.
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