DPG Phi
Verhandlungen
Verhandlungen
DPG

Dresden 2011 – scientific programme

Parts | Days | Selection | Search | Updates | Downloads | Help

TT: Fachverband Tiefe Temperaturen

TT 38: Poster Session Transport

TT 38.7: Poster

Wednesday, March 16, 2011, 14:00–18:00, P3

Real-time renormalization group for quantum dots with normal and superconducting leads — •Jacek Swiebodzinski1, Dirk Schuricht2, Jürgen König1, and Herbert Schoeller21Theoretische Physik, Universität Duisburg-Essen and CeNIDE, 47048 Duisburg, Germany — 2Institut für Theorie der Statistischen Physik, RWTH Aachen, 52056 Aachen, Germany

The real-time renormalization group in frequency space (RTRG-FS) is a formally exact perturbative renormalization group scheme from which the kernel of the kinetic equation for the reduced density matrix can be calculated. The method is applicable for small quantum systems, such as quantum dots, in contact with several particle or heat reservoirs. Since the formalism is based on a perturbative expansion in the system-reservoir coupling quantum systems with arbitrary large interaction strength can be treated. In its original form [1] the RTRG-FS was formulated for systems coupled to normal leads only. Here we present a generalization of the method to the case where the leads may be both normal or superconducting. In the latter case transport can be provided either by quasiparticle or Andreev tunneling giving rise to a rich variety of interesting physical phenomena. When several superconducting leads at different chemical potentials are present it is important to consider the energy contribution from the Cooper pair condensate in the leads. We in particular account for this situation. Finally we discuss some applications of the method.
H. Schoeller, Eur. Phys. J. Special Topics 168, 179 (2009).

100% | Mobile Layout | Deutsche Version | Contact/Imprint/Privacy
DPG-Physik > DPG-Verhandlungen > 2011 > Dresden