2 papers
cond-mat.quant-gas2025
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…
cond-mat.mes-hall2023
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…