<div class="csl-bib-body">
<div class="csl-entry">Kauch, A. K. (2025, June 11). <i>Capturing nonlocal correlations in electronic systems -- two-particle response and parquet equations</i> [Presentation]. CTP PAS Colloquim, Warsaw, Poland. http://hdl.handle.net/20.500.12708/225248</div>
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dc.identifier.uri
http://hdl.handle.net/20.500.12708/225248
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dc.description.abstract
Susceptibilities and optical conductivity are examples of two-particle
response functions that are the key quantities for connecting
theoretical predictions for corelated materials with experimental
results. It can however become highly nontrivial to calculate them,
especially in cases when nonlocal electronic correlations are important.
In my talk I will explain what two-particle correlations are and when
they become important. I will then present an overview of methods of
their computation with the focus on diagrammatic methods. I will show
results for two-particle (vertex) corrections to optical conductivity], that are present in systems with antiferromagnetic or charge
density wave fluctuations, leading to a displaced Drude peak in
correlated metals. At the end I will discuss computational
challenges and new methodological developments in the efficient
representation of two-particle correlation functions with the use of
quantics tensor trains.
en
dc.description.sponsorship
FWF - Österr. Wissenschaftsfonds
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dc.language.iso
en
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dc.subject
tow-particle response
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dc.subject
parquet equations
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dc.subject
vertex compression
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dc.title
Capturing nonlocal correlations in electronic systems -- two-particle response and parquet equations
en
dc.type
Presentation
en
dc.type
Vortrag
de
dc.relation.grantno
V 1018-N
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dc.type.category
Presentation
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tuw.publication.invited
invited
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tuw.project.title
Nonlocal correlations in nonequilibrium: parquet equations
