Speakers: Thomas Pruschke (Institut für Theoretische Physik, Universität Göttingen, Germany)
Place: Na Slovance, main lecture hall
Presented in English
Organisers:
Department of Condensed Matter Theory
Abstract:
Calculating properties of correlated systems out of equilibrium is a
challenging task, even if one targets only stationary situations.
In particular, transport through nano-objects like molecules or
quantum dots is of strong interest, and a theory to calculate
transport properties or merely local quantities in a reliable way for
reasonably strong correlations very desirable.
Based on a suggestion by Han and Heary [1] we show that one can use
advanced quantum Monte-Carlo techniques to calculate quantities
with high accuracy [2]. Employing a two-dimensional analytical
continuation based on maxium entropy, we are able to calculate
different local quantities in stationaery non-equilibrium, like current,
magnetization or double occupancy. We will compare our results
to others obtained by different methods like time-dependent numerical
renormalization, real-time quantum Monte-Carlo or real-time
density-matrix renormalization group.
[1] J.E. Han and R.J. Heary, Phys. Rev. Lett. 99, 236808 (2007).
[2] A. Dirks, Ph. Werner, M. Jarrell, and Th. Pruschke, Phys. Rev. E 82,
26701 (2010).
Copyright © 2008-2010, Fyzikální ústav AV ČR, v. v. i.
