Speaker
Dr
Edouard Boulat
(University Paris Diderot)
Description
Abstract: Transport in nanoscale quantum devices can be
described in some situations by quantum impurity
models in which the low energy regime is often a strong
coupling (SC) regime, the archetypical example maybe
being the Kondo model. We have recently developed a
framework for integrable models[1], in which we can
exactly tackle various out-of-equilibrium situations for
quantum impurities in their SC regime, using their
equilibrium integrability properties. It allows to compute
directly the expansion of the universal scaling functions for
physical quantities (like the electrical current), in principle to
arbitrarily high order in the driving out-of-equilibrium, be it
voltage, frequency,… In particular, we show how to apply
this to the Kondo model : our approach successfully goes
beyond known results for the electrical current and noise.
[1]: L.Freton and E.Boulat, arxiv/1303.7441, in review.
