Dinámica de un sistema de dos niveles controlado por un campo externo acoplado a un detector no lineal

Abstract

We study a qubit system externally driven by a time periodic external field, with a single electron transistor in the nonlinear regime as the detector of the qubit’s state. The qubit’s dissipative dynamics mainly takes place due to the linear coupling with the detector; the latter is, in turn, coupled to an Ohmic environment. In the Born-Markov regime, we calculate the qubit’s populations difference in presence of the detector: we find antiresonant peaks due to multiphoton transitions between Floquet states.