<div class="csl-bib-body">
<div class="csl-entry">Kauch, A. K. (2024, October 24). <i>Two-particle response with parqet equations</i> [Conference Presentation]. COMET 2024 : Correlated Materials & Electrons in Toulouse, Paul Sabatier University of Toulouse, France. http://hdl.handle.net/20.500.12708/210644</div>
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dc.identifier.uri
http://hdl.handle.net/20.500.12708/210644
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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 with experimental results. It can however become highly nontrivial to calculate them, especially in cases when vertex corrections are important. In my talk I will explain what vertex corrections to response functions are and when they become important. I will then present diagrammatic methods of their computation with the focus on parquet equations. I will show results for a special type of vertex corrections to optical conductivity, the ⇡ tons [1], that are present in systems with antiferromagnetic or charge density wave fluctuations. These vertex corrections lead to a displaced Drude paek in correlated metals. In the last part of my talk I will outline challenges faced when solving equations for two-particle quantities. I will focus on recent numerical developments in overcoming the curse of dimensionality in many-body two-particle calculations: the intermediate representation [3] and quantics tensor trains methods
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dc.description.sponsorship
FWF - Österr. Wissenschaftsfonds
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dc.description.sponsorship
FWF - Österr. Wissenschaftsfonds
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dc.language.iso
en
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dc.subject
optical conductivity
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dc.subject
parquet equatios
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dc.subject
quantics tensor trains
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dc.title
Two-particle response with parqet equations
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dc.type
Presentation
en
dc.type
Vortrag
de
dc.relation.grantno
I 6142-N
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dc.relation.grantno
V 1018-N
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dc.type.category
Conference Presentation
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tuw.publication.invited
invited
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tuw.project.title
Realistic simulations of correlations and disorder in materials
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tuw.project.title
Nonlocal correlations in nonequilibrium: parquet equations
