We consider the full quantum dynamics of a quantum dot in a resonant microcavity with optical feedback provided by a distant mirror

(half-cavity) and identify a stable state of the QD-microcavity subsystem. Specifically, we focus on the dynamics of a perturbed dark state of the emitter to ascertain its stability (existence of time oscillatory solutions around the candidate state). In particular, we find conditions under which multiple feedback modes of the half cavity contribute to the stability, showing certain analogies with the Lang-Kobayashi equations, which describe a laser diode subject to classical optical feedback.

This is joint work with C.Y. Chang (Georgia Institute of Technology).