Flat-band localization in Creutz superradiance lattices

TL;DR

This paper demonstrates the engineering and control of flat-band localization in Creutz superradiance lattices using tunable synthetic gauge fields, enabling exploration of correlated topological phenomena at room temperature.

Contribution

It introduces a method to control flat-band localization in atomic lattices via synthetic gauge fields, advancing flat-band physics and topological material research.

Findings

Successful tuning of hopping coefficients and Aharonov-Bohm phases.

Selective excitation and control of flat-band states.

Room-temperature platform for flat-band atomic systems.

Abstract

Flat bands play an important role in diffraction-free photonics and attract fundamental interest in many-body 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.