title: Nonlinear responses of degenerate two-level systems to intense few-cycle pulses.
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.
authors.affiliation: Institute of Atomic and Molecular Sciences, Academia Sinica, P.O. Box 23-166, Taipei 106, Taiwan. kuninobu.nagaya@st-systems.co.jp
authors.forename: Kuninobu
authors.initials: K
authors.lastname: Nagaya
authors.forename: Chaoyuan
authors.initials: C
authors.lastname: Zhu
authors.forename: Sheng Hsien
authors.initials: SH
authors.lastname: Lin