Transient quantum transport in double-dot Aharonov-Bohm interferometers

Matisse Wei-Yuan Tu, Wei-Min Zhang, Jinshuang Jin, O. Entin-Wohlman, A. Aharony
2012 Physical Review B  
Real-time nonequilibrium quantum dynamics of electrons in double-dot Aharonov-Bohm (AB) interferometers is studied using an exact solution of the master equation. The building of the coherence between the two electronic paths shows up via the time-dependent amplitude of the AB oscillations in the transient transport current, and can be enhanced by varying the applied bias on the leads, the on-site energy difference between the dots and the asymmetry of the coupling of the dots to the leads. The
more » ... transient oscillations of the transport current do not obey phase rigidity. The circulating current has an anti-symmetric AB oscillation in the flux. The non-degeneracy of the on-site energies and the finite bias cause the occupation in each dot to have an arbitrary flux dependence as the coupling asymmetry is varied.
doi:10.1103/physrevb.86.115453 fatcat:g3am6zpn5ncnrn5n2u2h2j4ztm