Technical University of Munich
Lehrstuhl für Theorie der kondensierten Materie (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.
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 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: We investigate a mechanism for nonergodic behavior arising from destructive interference in Fock space, leading to Fock space cages (FSCs)—exact zero-energy eigenstates localized on O(1) to O(Lp)…
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…
Quantum Science and Technology
Abstract: We introduce a holographic framework for the entanglement Hamiltonian in symmetry-protected topological (SPT) phases with area-law entanglement, whose reduced density matrix (RDM) (Formula presented)…
Physical Review B
Abstract: The behavior of the paradigmatic J1-J2 triangular lattice Heisenberg antiferromagnet in a magnetic field remains unsettled despite decades of study. We map out the phase diagram using three…
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 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…
