Coalescence of two branch points in complex time marks the end of rapid adiabatic passage and the start of Rabi oscillations

Petra Ruth Kapralova-Zdanska, Milan Sindelka, Nimrod Moiseyev

We study theoretically the population transfer in two-level atoms driven by chirped lasers. It is known that in the Hermitian case, the rapid adiabatic passage (RAP) is stable for…