Flat band fine-tuning and its photonic applications

C Danieli, A Andreanov, D Leykam, S Flach - Nanophotonics, 2024 - degruyter.com
Flat bands–single-particle energy bands–in tight-binding lattices, aka networks, have
attracted attention due to the presence of macroscopic degeneracies and their sensitivity to …

Emergent dipole moment conservation and subdiffusion in tilted chains

S Nandy, J Herbrych, Z Lenarčič, A Głódkowski… - Physical Review B, 2024 - APS
We study transport in an interacting tilted (Stark) chain. We show that the crossover between
diffusive and subdiffusive relaxation is governed by FL, where F is the strength of the field …

Superconductivity with Wannier-Stark flat bands

SM Chan, A Andreanov, S Flach, GG Batrouni - Physical Review B, 2024 - APS
We investigate superconducting transport in the DC field induced Wannier-Stark flat bands
in the presence of interactions. Flat bands offer the possibility of unconventional high …

Anti- flatbands

A Mallick, N Chang, A Andreanov, S Flach - Physical Review A, 2022 - APS
We consider tight-binding single-particle lattice Hamiltonians which are invariant under an
antiunitary antisymmetry: the anti-PT symmetry. The Hermitian Hamiltonians are defined on …

Anomalous localization in spin chains with tilted interactions

A Mallick, J Zakrzewski - Physical Review B, 2024 - APS
Quantum simulators of lattice gauge theories involve dynamics of typically short-ranged
interacting particles and dynamical fields. Elimination of the latter via Gauss law leads to …

Correlated metallic two-particle bound states in Wannier-Stark flatbands

A Mallick, A Andreanov, S Flach - Physical Review B, 2022 - APS
Tight-binding single-particle models on simple Bravais lattices in space dimension d≥ 2,
when exposed to commensurate DC fields, result in the complete absence of transport due …

Flat Bands in Network Superstructures of Atomic Chains

D Heo, J Lee, A Zhang, JW Rhim - Photonics, 2022 - mdpi.com
We investigate the origin of the ubiquitous existence of flat bands in the network
superstructures of atomic chains, where one-dimensional (1D) atomic chains array …

Flatbands in tight-binding lattices with anisotropic potentials

A Mallick, A Andreanov - arxiv preprint arxiv:2409.11336, 2024 - arxiv.org
We consider tight-binding models on Bravais lattices with anisotropic onsite potentials that
vary along a given direction and are constant along the transverse one. Inspired by our …

Intermediate superexponential localization with Aubry-André chains

A Mallick, A Andreanov, S Flach - Physical Review B, 2023 - APS
We demonstrate the existence of an intermediate superexponential localization regime for
eigenstates of the Aubry-André chain. In this regime, the eigenstates localize similar to the …

Strong Correlations and Superconductivity on the Flat Band

CS Min - 2023 - search.proquest.com
Flat bands have proven to be ideal candidates for high temperature superconductivity. The
energy bands have zero dispersion and in the absence of interactions, the particles are …