Technische Universität München
Lehrstuhl für Theorie der kondensierten Materie (Prof. Pollmann)
James-Franck-Str. 1
85748 Garching b. München
Wir sind an einer Vielzahl von Problemen in der Theorie der kondensierten Materie interessiert. Unser Schwerpunkt liegt auf der Untersuchung von Phänomenen, die durch quantenmechanische Effekte in Systemen korrelierter Elektronen entstehen. Zu den Forschungsgebieten gehören die Untersuchung topologischer Phasen der Materie, geometrisch frustrierte Systeme, die Dynamik in Quanten-Vielteilchensystemen und die Anwendung von Quanteninformationskonzepten.
Nature
Abstract: Digital quantum matter—realized when discrete quantum gates approximate continuous time evolution—is susceptible to heating into chaotic, structureless states1. If digitization errors are adequately…
Physical Review B
Abstract: Isometric tensor network states (isoTNS) generalize the isometric form of the one-dimensional matrix product states to tensor networks in two and higher dimensions. Here, we introduce an alternative…
Physical Review B
Abstract: Motivated by recent experiments, we investigate the spin-2 1 XXZ model on the triangular lattice with strong Ising anisotropy, combining large-scale numerical simulations and analytical methods to…
Nature Reviews Physics
Abstract: It is an ongoing quest to realize topologically ordered quantum states on different platforms including condensed matter systems, quantum simulators and digital quantum processors. Unlike conventional…
Physical Review Letters
Abstract: We construct parametrized isometric tensor network states—referred to as “skeletons”—that allow us to explore phases of Abelian topological order and can be efficiently implemented on quantum…
Physical Review B
Abstract: An important result in the theory of quantum control is the “universality” of 2-local unitary gates, i.e., the fact that any global unitary evolution of a system of L qudits can be implemented by…
Quantum
Abstract: In unitary circuit games, two competing parties—an “entangler” and a “disentangler”—can induce an entanglement phase transition in a quantum many-body system. The transition occurs at a certain rate…
npj Quantum Information
Abstract: A nonlocal string order parameter detecting topological order and deconfinement has been proposed by Fredenhagen and Marcu (FM). However, due to the lack of exact internal symmetries for lattice…
PRX Quantum
Abstract: The realization of synthetic gauge fields for charge neutral ultracold atoms and the simulation of quantum Hall physics have witnessed remarkable experimental progress. Here, we establish key…
Nature
Abstract: Lattice gauge theories (LGTs)1, 2, 3–4 can be used to understand a wide range of phenomena, from elementary particle scattering in high-energy physics to effective descriptions of many-body…
