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Quantitative Spatio-Temporal Model-Building for Correlated Electronic Matter

Applicant Neupert Titus
Number 198011
Funding scheme Project funding (Div. I-III)
Research institution Physik-Institut Universität Zürich
Institution of higher education University of Zurich - ZH
Main discipline Condensed Matter Physics
Start/End 01.12.2021 - 30.11.2025
Approved amount 457'844.00
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Keywords (3)

correlated electrons; topological properties of materials; nonequilibrium dynamics

Lay Summary (German)

Das Ziel der Forschergruppe QUAST ist eine quantitativ zuverlaessige Beschreibung von Dynamik, Topologie und Wechselwirkungseffekten in Festkoerpern.
Lay summary
Drei Gebiete spielen eine herausragende Rolle in der modernen Festkoerperphysik: (i) die Untersuchung von Materialien mit stark wechselwirkenden Elektronen, (ii) topologische Phaenomene und ihre physikalischen Konsequenzen, und (iii) Nichtgleichgewichtseigenschaften von Festkoerpern. Die Forschergruppe QUAST vereint Expertinnen und Experten in diesem Gebiet, mit dem Ziel, die ueberlappenden Bereiche dieser Forschungsgebiete genauer zu verstehen. Mit Hilfe von modernen Algorithmen und numerischen Methoden sollen zum Beispiel die Nichtgleichgewichtsdynamik stark wechselwirkender Elektronen, oder die Wechselwirkungseffekte in topologischen Systemen untersucht werden. Durch den Fokus auf drei Materialklassen, und die enge Zusammenarbeit mit experimentellen Gruppen, ist es moeglich, die verschiedenen Methoden zu vergleichen und ihre Zuverlaessigkeit zu testen. Die so weiterentwickelten Methoden erlauben quantitative Voraussagen zu Dynamik, Topologie und Korrelationseffekten in technologisch besonders relevanten Festkoerpersystemen.    
Direct link to Lay Summary Last update: 04.12.2021

Responsible applicant and co-applicants


Associated projects

Number Title Start Funding scheme
182892 NCCR MARVEL: Materials’ Revolution: Computational Design and Discovery of Novel Materials (phase II) 01.05.2018 National Centres of Competence in Research (NCCRs)
165539 Dynamics of electron-boson systems 01.02.2017 Project funding (Div. I-III)
176877 Topological Phases: From New Fermions to Materials and Devices 01.06.2018 SNSF Professorships
196966 Correlated multi-orbital lattice systems 01.02.2021 Project funding (Div. I-III)


Topological quantum phenomena and breakthroughs in time-resolved spectroscopy pose a new challenge for many-body theory: Spatio-temporal electronic correlations often strongly impact topological and dynamical material properties but at the same time hinder an unambiguous interpretation of experiments, let alone a reliable quantitative prediction of material properties.The research unit QUAST (QUAntitative Spatio-Temporal model-building for correlated electronic matter) aims at addressing this challenge by a coordinated effort in theoretical method development and concerted experiments: Our central goal is to develop an electronic structure theory accounting for spatio-temporal electronic correlations to ultimately explain and quantitatively model topological and dynamical phenomena in correlated materials.The research groups in this initiative will develop theoretical ansatze at complementary levels of approximation, abstraction, and spatio-temporal character. Our research agenda spansfrom more approximate but in parts already material realistic (GW+EDMFT, DFT+TPSC; for a list of abbreviations see p. 3) to the most accurate but currently more model-based approaches(DGA, dual fermions/bosons, quantum cluster theories). We will cover descriptions ranging from the shortest spatio-temporal scales (DFT++, GW++) to the longest ones (diagrammatic exten-sions of DMFT and ASD). The advancement and combination of these theoretical approaches is indispensable to push the modeling of spatio-temporal correlations towards topological and dynamical phenomena, and requires a concerted effort as implemented in the research unit QUAST. The theory developments will be made in close cooperation with three experimental groups embedded in QUAST, which also define a common set of focal topics and materials.