Flat-band localization in Creutz superradiance lattices

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.

6 pages, 4 figures

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• Measuring Zak phase in room-temperature atoms
• Metal-insulator transition in infinitesimally weakly disordered flatbands
• Line-graph-lattice crystal structures of stoichiometric materials
• Topological chiral currents in the Gross-Neveu model extension
• Critical States Generators from Perturbed Flatbands
• Tunable Aharonov-Bohm cages through anti-$\mathcal{P}\mathcal{T}$-symmetric imaginary couplings
• Surge of power transmission in flat and nearly flat band lattices
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• Velocity Scanning Tomography for Room-Temperature Quantum Simulation
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• Spin-orbit interactions may relax the rigid conditions leading to flat bands
• Generalized Aubry-Andre-Harper Models in Optical Superlattices
• Synthetic $\pi$-flux system in 2D superconducting qubit array with tunable coupling
• Critical properties in the non-Hermitian Aubry-Andre-Stark model
• Hidden topology in flat-band topological insulators: Strong, weak and square-root topological states
• Dissipation-Driven Transition of Particles from Dispersive to Flat Bands
• Compact localized currents in flat bands with broken time-reversal symmetry
• Ultracold atomic lattice systems for simulating topological phases: A review