Berlin 2012 – wissenschaftliches Programm
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TT: Fachverband Tiefe Temperaturen
TT 45: Correlated Electrons: Poster Session
TT 45.57: Poster
Donnerstag, 29. März 2012, 15:00–19:00, Poster B
QMC impurity solvers for two-particle Green's functions. — •Pavel Augustinský1,2 and Jan Kuneš2 — 1Universitaet Augsburg — 2Institute of Physics, Academy of Sciences of the Czech Republic
The fundamental observable for QMC impurity solvers, the one-particle Green's function, does not contain a complete information about the studied system. The two-particle Green's function brings additional insight into electronic correlations, response functions and related quantities absent in the one-particle case. However, measurement of 2P Green's functions involves technical difficulties. We present comparison of the Hirsch-Fye and the continuous-time QMC techniques for 2P Green's functions. Namely, we address performance issues and discuss areas of applicability.