Nonequilibirum noise spectrum and Coulomb blockade assisted Rabi interference in a double-dot Aharonov-Bohm interferometer

We investigate charge-state coherence dynamics in nonequilibrium transport through a double-dot Aharonov-Bohm interferometer. On the basis of accurate numerical evaluations, we identity an interesting many-particle mechanism, the Coulomb blockade assisted Rabi interference, as an interplay between interdot Coulomb interaction and environment-assisted interdot tunneling and Rabi resonance. This many-particle multiple-interference mechanism has distinct signatures in the transport current noise spectrum, with the emerging Fano characteristics sensitive to the Aharonov-Bohm phase.