Indirect spin dephasing via charge state decoherence in optical control schemes in quantum dots

Grodecka, A.; Machnikowski, P.; Förstner, J.

Indirect spin dephasing via charge state decoherence in optical control schemes in quantum dots

Authors

Grodecka, A.

Machnikowski, P.

Förstner, J.

Description

We demonstrate that an optically driven spin of a carrier in a quantum dot undergoes indirect dephasing via conditional optically induced charge evolution even in the absence of any direct interaction between the spin and its environment. A generic model for the indirect dephasing with a three-component system with spin, charge, and reservoir is proposed. This indirect decoherence channel is studied for the optical spin manipulation in a quantum dot with a microscopic description of the charge-phonon interaction taking into account its non-Markovian nature.
Final extended version, 6 pages, 2 new figures