[qmeso-seminar] семинар сектора 25 мая

[Mikhail A. Skvortsov]

                     СЕМИНАР СЕКТОРА КВАНТОВОЙ МЕЗОСКОПИКИ

                           пятница 25 мая, 15:00, ИТФ


                Alexander Altland, _Yuval Gefen_, Bernd Rosenow

      Incoherent scatterer in a Luttinger liquid: a new paradigmatic limit


We address the problem of a Luttinger liquid with a scatterer that allows 
for both coherent and incoherent scattering channels. The asymptotic behavior 
at zero temperature is governed by a new stable fixed point: a Goldstone mode
dominates the low energy dynamics, leading to a universal behavior. This 
limit is marked by equal probabilities for forward and backward scattering.
Notwithstanding this non-trivial scattering pattern, we find that the shot 
noise as well as zero cross-current correlations vanish. We thus present 
a paradigmatic picture of an impurity in the Luttinger model, alternative 
to the Kane-Fisher picture.