Berlin 2015 – wissenschaftliches Programm
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TT: Fachverband Tiefe Temperaturen
TT 65: Low-Dimensional Systems: 1D – Theory
TT 65.8: Vortrag
Mittwoch, 18. März 2015, 17:15–17:30, H 0104
Dynamics of S=1 Heisenberg chains at finite temperatures — •Thomas Köhler1, Salvatore R. Manmana1, Stephan C. Kramer2, Andreas Honecker3, and Thomas Pruschke1 — 1Institut f. Theoretische Physik, Universität Göttingen — 2Max-Planck-Institut f. biophysikalische Chemie, Göttingen — 3LPTM, Université de Cergy-Pontoise, France
We compute dynamical spectral functions for S=1 Heisenberg systems at finite temperatures T using matrix product state (MPS) approaches. This is achieved by parallelizing the time evolution on GPUs, and via a linear prediction ansatz on the time evolution results. We discuss the effect of temperature on the spectral functions and provide an outlook on the fate of the Haldane state upon increasing T.