Flat-band localization and interaction-induced delocalization of photons

JGC Martinez, CS Chiu, BM Smitham, AA Houck - Science Advances, 2023 - science.org
Lattices with dispersionless, or flat, energy bands have attracted substantial interest in part
due to the strong dependence of particle dynamics on interactions. Using superconducting …

Flat band based multifractality in the all-band-flat diamond chain

A Ahmed, A Ramachandran, IM Khaymovich… - Physical Review B, 2022 - APS
We study the effect of quasiperiodic Aubry-André disorder on the energy spectrum and
eigenstates of a one-dimensional all-band-flat (ABF) diamond chain. The ABF diamond …

Exact non-Hermitian mobility edges and robust flat bands in two-dimensional Lieb lattices with imaginary quasiperiodic potentials

XP Jiang, W Zeng, Y Hu, P Liu - New Journal of Physics, 2024 - iopscience.iop.org
The mobility edge (ME) is a critical energy delineates the boundary between extended and
localized states within the energy spectrum, and it plays a crucial role in understanding the …

Phase transitions of the anisotropic Dicke model

P Das, DS Bhakuni, A Sharma - Physical Review A, 2023 - APS
We systematically analyze the various phase transitions of the anisotropic Dicke model that
is endowed with both rotating and counterrotating light-matter couplings. In addition to the …

Coexistence of localization and transport in many-body two-dimensional Aubry-André models

A Štrkalj, EVH Doggen, C Castelnovo - Physical Review B, 2022 - APS
Whether disordered and quasiperiodic many-body quantum systems host a long-lived
localized phase in the thermodynamic limit has been the subject of intense recent debate …

Two-dimensional vertex-decorated Lieb lattice with exact mobility edges and robust flat bands

Y Wang, L Zhang, Y Wan, Y He, Y Wang - Physical Review B, 2023 - APS
The mobility edge (ME) that marks the energy separating extended and localized states is a
most important concept in understanding the metal-insulator transition induced by …

Transition from flat-band localization to Anderson localization in a one-dimensional Tasaki lattice

C Zeng, YR Shi, YY Mao, FF Wu, YJ **-induced states at the Fermi level
MM Hirschmann, J Mitscherling - Physical Review Materials, 2024 - APS
Two common difficulties in the design of topological quantum materials are that the desired
features lie too far from the Fermi level and are spread over a too-large energy range …

Interplay and competition between disorder and flat band in an interacting Creutz ladder

T Orito, Y Kuno, I Ichinose - Physical Review B, 2021 - APS
We clarify the interplay and competition between disorder and flat band in the Creutz ladder
with interparticle interactions focusing on the system's dynamics. Without disorder, the …