摘要
We investigate the dependence of the dephasing rate in a ballistic Aharonov-Bohm ring on the temperature T, the bias current, and the probe configuration. We find that the probe configuration influences the conductance but not the dephasing rate. Rather, averaging of the transmission phase, carried by thermally excited or current-induced electrons results in dephasing. We find that the appropriate energy window responsible for the dephasing is set by the drift velocity of the interfering electrons and the asymmetry of the ring path. © 2010 The American Physical Society.