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Phase coherence and nonadiabatic transition at a level crossing in a periodically driven two-level system

1993; American Physical Society; Volume: 47; Issue: 15 Linguagem: Inglês

10.1103/physrevb.47.9940

1095-3795

Yōsuke Kayanuma,

Nonlinear Dynamics and Pattern Formation

Some aspects of the Landau-Zener-type transition of a periodically driven two-level system with dephasing are clarified. Under the condition that the transition is well localized around the level-crossing region, the transition dynamics for the typical cases is described by simple formulas; namely, by the transfer-matrix method for the long-range coherence, by the application of the incoherent Landau-Zener formula for the short-range coherence, and by the strong-dephasing formula in the limit of complete decoherence.