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 - 237009

0031-9007

We distinguish different mechanisms for population inversion in flux qubits driven by dc+ ac magnetic fields. We show that for driving amplitudes such that there are Landau-Zener-Stuckelberg interferences, it is 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 p in theenvironmental bath. To observe these effects experiments should be performed for long driving times after full relaxation.