Regensburg 2013 – wissenschaftliches Programm

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TT: Fachverband Tiefe Temperaturen

TT 40: Poster Session Correlated Electrons

TT 40.5: Poster

Mittwoch, 13. März 2013, 15:00–19:00, Poster D

Real space Correlations of Impurities in a Dissipative Environment — •Etienne Gärtner and Ralf Bulla — Institute for theoretical Physics, University of Cologne, Germany

We investigate a model in which two magnetic impurities couple to a one-dimensional lattice of bosons. Since the system is treated quantum-mechanically there can show up the phenomena of coherence between different states and that of entanglement between e.g. the impurities. It is investigated in which way the entanglement between the impurities varies as the distance between the impurities in real space is altered. The models under investigation cannot be solved analytically and are numerically very demanding. It is treated within the Numerical Renormalization Group (NRG) approach that is adapted to deal with multiple bosonic baths which show up in the transformations performed in the NRG.