6 papers
Effect of Two-Body Interactions on Floquet topological phases
Arijit Dutta, Souradeep Roy Choudhury, Tao Qin +1
We study the circularly driven Falicov-Kimball model on a honeycomb lattice within real space Floquet dynamical mean field theory (DMFT). The noninteracting version of this model h…
Paramagnetic phases of strongly correlated ultracold fermions coupled to an optical cavity
Renan da Silva Souza, Youjiang Xu, Walter Hofstetter
We numerically study a gas of two-component fermions coupled to a transversely pumped optical cavity and confined to a two-dimensional static square optical lattice. In the dispers…
Phase Diagram and Spectral Function of the Two-Dimensional Disordered Bose-Hubbard Model: A Real-Space Dynamical Mean-Field Theory Analysis
Bastian Schindler, Renan da Silva Souza, Walter Hofstetter
We numerically investigate the two-dimensional Bose-Hubbard model with local onsite disorder, where the competition between disorder and short-range interactions leads to the emerg…
The anomalous Floquet Anderson insulator in a continuously driven optical lattice
Arijit Dutta, Efe Sen, Jun-Hui Zheng +2
The anomalous Floquet Anderson insulator (AFAI) has been theoretically predicted in step-wise periodically driven models, but its stability under more general driving protocols has…
Getting topological invariants from snapshots: a protocol for defining and calculating topological invariants of systems with discrete parameter space
Youjiang Xu, Walter Hofstetter
Topological invariants, including the Chern numbers, can topologically classify parameterized Hamiltonians. We find that topological invariants can be properly defined and calculat…
Floquet topological phase transitions induced by uncorrelated or correlated disorder
Jun-Hui Zheng, Arijit Dutta, Monika Aidelsburger +1
The impact of weak disorder and its spatial correlation on the topology of a Floquet system is not well understood so far. In this study, we investigate a model closely related to…