Tailoring population inversion in Landau-Zener-Stückelberg interferometry of flux qubits.
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-Stückelberg interferences, it is possible to have population inversion solely mediated by the environmental bath. Furthermore, we find that the degree of population inversion can be controlled by tailoring a resonant frequency Ω(p) in the environmental bath. To observe these effects experiments should be performed for long driving times after full relaxation.
Instituto de Modelado e Innovación Tecnológica (CONICET-UNNE), 3400 Corrientes and Centro Atómico Bariloche and Instituto Balseiro, 8400 San Carlos de Bariloche, Río Negro, Argentina.
Alejandro
A
Ferrón
Daniel
D
Domínguez
María José
MJ
Sánchez