Technical University of Munich
Chair of Condensed Matter Theory (Prof. Pollmann)
James-Franck-Str. 1
85748 Garching b. München
We are interested in a variety of problems in condensed matter theory. Our main focus lies on the study of phenomena which arise due to quantum mechanical effects in systems of correlated electrons. Areas of research include the study of topological phases of matter, geometrically frustrated systems, dynamics in quantum many-body systems, and the applications of quantum information concepts to condensed matter physics.
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
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…
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…
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…
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 X
Abstract: We find that the presence of strong non-Abelian symmetries can lead to highly entangled stationary states even for unital quantum channels. We derive exact expressions for the bipartite logarithmic…
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…
PRX Quantum
Abstract: Isometric tensor networks in two dimensions enable efficient and accurate study of quantum manybody states, yet the effect of the isometric restriction on the represented quantum states is not fully…
Physical Review Letters
Abstract: We investigate a model of Dirac fermions with mass impurities that open a global topological gap even in the dilute limit. Surprisingly, we find that the chirality of this mass term, i.e., the sign of…
