Population inversion of a driven two-level system in a structureless bath.
We derive a master equation for a driven double quantum dot damped by an unstructured phonon bath, and calculate the spectral density. We find that bath-mediated photon absorption is important at relatively strong driving, and may even dominate the dynamics, inducing population inversion of the double-dot system. This phenomenon is consistent with recent experimental observations.
Stace
T M
TM
DAMTP, University of Cambridge, UK. tms29@cam.ac.uk
Doherty
A C
AC
Barrett
S D
SD