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BEGIN:VEVENT
DTSTAMP:20240222T145605Z
UID:https://www.mpsd.mpg.de/events/21808/333641
DTSTART:20191015T090000Z
DTEND:20191015T100000Z
CLASS:PUBLIC
CREATED:20191009T121902Z
DESCRIPTION:Green's functions represent one of the most useful tools for th
e theoretical description of correlated lattice electrons. In particular\,
the one-particle Green's function contains information about the spectral
properties of the system and can be directly compared to (angular resolve
d) photoemission spectroscopy experiments. However\, also two-particle cor
relations functions provide very interesting insights into the properties
of correlated electron systems as they contain crucial information on resp
onse functions such as the magnetic susceptibility or the optical conducti
vity. In my talk\, I will present an overview about the physical content a
s well as the applications of two-particle Green's and vertex functions in
frontier condensed matter research. In particular\, I will demonstrate ho
w local frequency-dependent vertices can be used to include non-local corr
elations effects in interacting many-electron systems on top of the local
ones of dynamical mean-field theory (DMFT). While these so-called diagramm
atic extensions [1] of DMFT have been successfully exploited to describe c
ollective phenomena such as magnetism and superconductivity\, their predic
tive power is still limited by specific inconsistencies between the one- a
nd the two-particle level [2]. In the final part of my talk\, I will prese
nt possible solutions to these problems [3] which I will address in the fr
amework of my Emmy Noether project at the University of Hamburg.\nSpeaker:
Georg Rohringer
LAST-MODIFIED:20191009T125846Z
LOCATION:CFEL (Bldg. 99)\, Room: Seminar Room I\, EG.076
ORGANIZER:Michael Sentef
SUMMARY:MPSD Seminar: Two-particle correlation functions for the theoretica
l description of strongly correlated electrons systems
URL:https://www.mpsd.mpg.de/events/21808/333641
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