33 citations · 165 across the 12 of their papers we have counts for
13 papers
Flat-band-induced superconductivity in synthetic bilayer optical lattices
Tymoteusz Salamon, Bernhard Irsigler, Debraj Rakshit +3
Stacking two layers of graphene with a relative twist angle gives rise to moiré patterns, which can strongly modify electronic behavior and may lead to unconventional superconducti…
The quantum annealing gap and quench dynamics in the exact cover problem
Bernhard Irsigler, Tobias Grass
Quenching and annealing are extreme opposites in the time evolution of a quantum system: Annealing explores equilibrium phases of a Hamiltonian with slowly changing parameters and…
Spin-orbit coupling in the kagome lattice with flux and time-reversal symmetry
Irakli Titvinidze, Julian Legendre, Maarten Grothus +3
We study the topological properties of a spin-orbit coupled Hofstadter model on the Kagome lattice. The model is time-reversal invariant and realizes a topological i…
Topological Mott transition in a Weyl-Hubbard model with dynamical mean-field theory
Bernhard Irsigler, Tobias Grass, Jun-Hui Zheng +2
Weyl semimetals are three-dimensional, topologically protected, gapless phases which show exotic phenomena such as Fermi arc surface states or negative magnetoresistance. It is an…
Interaction-driven topological phase transitions in fermionic SU() systems
Mohsen Hafez-Torbati, Jun-Hui Zheng, Bernhard Irsigler +1
We consider SU() fermions on the triangular lattice in the presence of a gauge potential which stabilizes a quantum Hall insulator (QHI) at the density of one particle per latti…
Z2 characterization for three-dimensional multiband Hubbard models
Bernhard Irsigler, Jun-Hui Zheng, Fabian Grusdt +1
We introduce three numerical methods for characterizing the topological phases of three-dimensional multiband Hubbard models based on twisted boundary conditions, Wilson loops, as…
Bulk topological proximity effect in multilayer systems
Jaromir Panas, Bernhard Irsigler, Jun-Hui Zheng +1
We investigate the bulk topological proximity effect in multilayer hexagonal lattice systems by which one can introduce topological properties into a system composed of multiple tr…
Local Chern marker of smoothly confined Hofstadter fermions
Urs Gebert, Bernhard Irsigler, Walter Hofstetter
The engineering of topological non-trivial states of matter, using cold atoms, has made great progress in the last decade. Driven by experimental successes, it has become of major…
Microscopic characteristics and tomography scheme of the local Chern marker
Bernhard Irsigler, Jun-Hui Zheng, Walter Hofstetter
The concept of the local Chern marker has gained a lot of attention especially in the field of ultracold quantum gases in optical lattices and artificial gauge fields. We investiga…
Measuring the topological phase transition via the single-particle density matrix
Jun-Hui Zheng, Bernhard Irsigler, Lijia Jiang +2
We discuss the topological phase transition of the spin- fermionic Haldane model with repulsive on-site interaction. We show that the Berry curvature of the topologica…
Spin-imbalance-induced transverse magnetization in the Hofstadter-Hubbard model
Bernhard Irsigler, Jun-Hui Zheng, Mohsen Hafez-Torbati +1
The fermionic, time-reversal invariant Hofstadter-Hubbard model with a population difference between the two spin states is investigated. In the strongly interacting regime, where…
Interacting Hofstadter Interface
Bernhard Irsigler, Jun-Hui Zheng, Walter Hofstetter
Two-dimensional topological insulators possess conducting edge states at their boundary while being insulating in the bulk. The detection of edge states remains an open question in…
Dimensionally Induced Phase Transition of the Weakly Interacting Ultracold Bose Gas
Bernhard Irsigler, Axel Pelster
We investigate the dimensionally induced phase transition from the normal to the Bose-Einstein-condensed phase for a weakly interacting Bose gas in an optical lattice. To this end…