Time-resolved quantum spin transport through an Aharonov-Casher ring

Based on the exact analytical time-varying solution of a conducting ring embedded in a textured static/dynamic electric field, we investigate the time-resolved quantum spin transport in the structure. It is shown that the interference patterns are governed by not only the Aharonov-Casher phase but also the \emph{instantaneous} phase difference of spin precession. This spin precessing phase has strong effect on the spin conductance and results in a high-frequency oscillation mode with respect to the strength of electric field, especially in the weak value cases. Our studies suggest that a quasi-static moderate field is favor to modulate the spin polarization orientation of incident electron.