Thursday, January 19, 2006, 1:30 pm — Small Seminar Room, Bldg. 510
Shot noise, the weak localization correction to the conductance, and
universal conductance fluctuations are manifestations of the wave nature
of electrons. I'll consider these three signatures of quantum transport
for a ballistic quantum dot coupled to source and drain reservoirs via
ballistic point contacts. Semiclassical theory predicts that the
signatures of quantum transport are suppressed if the "Ehrenfest time"
exceeds the dwell time in the cavity. The Ehrenfest time is the time
necessary for a minimal wave packet to diverge a distance of the order
of the size of the quantum dot. I'll review this semiclassical theory,
report numerical simulations that confirm this prediction, and discuss
presently unsolved problems.
Hosted by: Robert Konik
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