Flat-Band Localization in Creutz Superradiance Lattices

Flat bands play an important role in diffraction-free photonics and attract fundamental interest in manybody physics. Here we report the engineering of flat-band localization of collective excited states of atoms in Creutz superradiance lattices with tunable synthetic gauge fields. Magnitudes and phases of the lattice hopping coefficients can be independently tuned to control the state components of the flat band and the Aharonov-Bohm phases. We can selectively excite the flat band and control the flat-band localization with the synthetic gauge field. Our study provides a room-temperature platform for flat bands of atoms and holds promising applications in exploring correlated topological materials.

Automated summary

The study demonstrates the engineering of flat-band localization of collective excited states of atoms in Creutz superradiance lattices using tunable synthetic gauge fields. By independently tuning the magnitudes and phases of the lattice hopping coefficients, the components of the flat band and the Aharonov-Bohm phases can be controlled. This research provides a room-temperature platform for flat bands of atoms and has promising applications in exploring correlated topological materials.