Theoretical Physics III: Correlated quantum matter

In our research we are interested in the dynamics of correlated quantum matter at the interface between quantum many-body theory, nonequilibrium physics, quantum information science, and machine learning. The research covers the development of a theory of dynamical quantum phase transitions, the dynamics in lattice gauge theories, the exploration of machine learning techniques as a new toolbox in quantum many-body theory, many-body localization in interacting strongly disordered systems, or entanglement in correlated quantum matter.


Below you can find a selection of recent research conducted in this group.


The full list of publications of the chair can be found here.

Sept. 27, 2022

Feenberg Medal für Augsburger Physiker

Dem theoretischen Physiker Dieter Vollhardt wurde in den USA die "2022 Feenberg Memorial Medal" verliehen. Vollhardt, ehemaliger Inhaber des Lehrstuhls für Theoretische Physik III/Elektronische Korrelationen und Magnetismus am Institut für Physik der Universität Augsburg, erhielt die hohe Auszeichnung zusammen mit Antoine Georges (Frankreich) und Gabriel Kotliar (USA).

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Gabriel Kotliar (USA), Dieter Vollhardt und Antoine Georges (Frankreich) bei der Verleihung der Feenberg Memorial Medal.
Sept. 21, 2022

Fundamentale Frage der Quantenphysik

Ein internationales Team von Physikern unter Beteiligung der Universität hat erstmals eine wichtige theoretische Vorhersage der Quantenphysik bestätigt. Die Berechnungen dazu sind so komplex, dass sie bislang selbst Supercomputer überforderten. Den Forschern gelang es jedoch, sie mit Methoden aus dem Bereich der künstlichen Intelligenz deutlich zu vereinfachen.

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Sept. 9, 2021

Paper: Reinforcement Learning for Digital Quantum Simulation

Digital quantum simulation on quantum computers provides the potential to simulate the unitary evolution of any many-body Hamiltonian with bounded spectrum by discretizing the time evolution operator through a sequence of elementary quantum gates. A fundamental challenge in this context originates from experimental imperfections, which critically limits the number of attainable gates...

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July 27, 2021

Paper: Unitary Long-Time Evolution with Quantum Renormalization Groups and Artificial Neural Networks

In this work, we combine quantum renormalization group approaches with deep artificial neural networks for the description of the real-time evolution in strongly disordered quantum matter. We find that this allows us to accurately compute the long-time coherent dynamics of large many-body localized systems in nonperturbative regimes including the effects of many-body resonances.

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April 1, 2021

Paper: Disorder-Free Localization in an Interacting 2D Lattice Gauge Theory

Disorder-free localization has been recently introduced as a mechanism for ergodicity breaking in low-dimensional homogeneous lattice gauge theories caused by local constraints imposed by gauge invariance. We show that also genuinely interacting systems in two spatial dimensions can become nonergodic as a consequence of this mechanism.

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Sept. 2, 2020

Paper: Quantum Many-Body Dynamics in Two Dimensions with Artificial Neural Networks

The efficient numerical simulation of nonequilibrium real-time evolution in isolated quantum matter constitutes a key challenge for current computational methods. This holds in particular in the regime of two spatial dimensions, whose experimental exploration is currently pursued with strong efforts in quantum simulators. In this work we present a versatile and efficient machine learning inspired approach based on a recently introduced artificial neural network encoding of quantum many-body wave functions.

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Contact information:

Address: Universitätsstraße 1 (Physik Süd), 86159 Augsburg
Telefon: +49-(0)-821-598-3701 (Secretary’s office)

Fax: +49-(0)-821-598-3725


Office: 410 (S)

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