Dresden 2014 – scientific programme
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TT: Fachverband Tiefe Temperaturen
TT 74: Correlated Electrons: Quantum Impurities, Kondo Physics
TT 74.6: Talk
Wednesday, April 2, 2014, 16:15–16:30, BEY 81
Continuous-time Quantum Monte Carlo approach for quantum impurity problems in Tomonaga-Luttinger liquids — •Kazumasa Hattori1,2 and Achim Rosch1 — 1Institute for Theoretical Physics, University of Cologne, Germany — 2Institute for Solid State Physics, University of Tokyo, Japan
We have developed a continuous-time quantum monte carlo method [1] for single-impurity problems in Tomonaga-Luttinger (TL) liquid in one-dimension. The method is negative-sign free and applicable to varieties of models. In this contribution, we will show results for a potential barrier problem in one-channel TL liquid [2] as a benchmark and also discuss an anisotropic Kondo problem in a helical TL liquid on the edge of two-dimensional topological insulator. Various correlation functions are calculated and we discuss the crossover functions from high- to very low-temperature fixed points and their critical behaviors.
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