Tailoring Population Inversion in Landau-Zener-Stuckelberg Interferometry of Flux Qubits

ALEJANDRO FERRÓN; DANIEL DOMINGUEZ; MARIA JOSE SANCHEZ

PHYSICAL REVIEW LETTERS

AMER PHYSICAL SOC

Lugar: New York; Año: 2012 vol. 109 p. 237005 - 237005

0031-9007

We distinguish different mechanisms for population inversion in flux qubits driven by dc + ac magneticfields. We show that for driving amplitudes such that there are Landau-Zener-Stuckelberg interferences, itis possible to have population inversion solely mediated by the environmental bath. Furthermore, we findthat the degree of population inversion can be controlled by tailoring a resonant frequency Wp in theenvironmental bath. To observe these effects experiments should be performed for long driving times afterfull relaxation.