Berlin 2015 – wissenschaftliches Programm

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TT: Fachverband Tiefe Temperaturen

TT 65: Low-Dimensional Systems: 1D – Theory

TT 65.1: Topical Talk

Mittwoch, 18. März 2015, 15:00–15:30, H 0104

Strong Correlations in Disordered One-Dimensional Systems — •Christoph Karrasch and Joel Moore — UC Berkeley, USA

We investigate the effects of strong electronic correlations in disordered one-dimensional systems such as XXZ spin chains. In order to study the problem from different perspectives, both semi-analytical methods (the functional renormalization group) and purely computational techniques (the density matrix renormalization group) are employed. First, we briefly discuss a recently-introduced `disentangler' which allows to carry out finite-temperature dynamical DMRG simulations up to larger times. Thereafter, we study a variety of questions: How is Luttinger liquid behavior cut off by weak disorder? Are there new power laws? Can we identify many-body localized and metallic phases if the disorder is strong, and can we learn something about the transition between the two?