Quantum metric and correlated states in two-dimensional systems

E Rossi - Current Opinion in Solid State and Materials Science, 2021 - Elsevier
The recent realization of twisted, two-dimensional, bilayers exhibiting strongly correlated
states has created a platform in which the relation between the properties of the electronic …

The Fulde–Ferrell–Larkin–Ovchinnikov state for ultracold fermions in lattice and harmonic potentials: a review

JJ Kinnunen, JE Baarsma… - Reports on Progress …, 2018 - iopscience.iop.org
We review the concepts and the present state of theoretical studies of spin-imbalanced
superfluidity, in particular the elusive Fulde–Ferrell–Larkin–Ovchinnikov (FFLO) state, in the …

Measurement of the quantum geometric tensor and of the anomalous Hall drift

A Gianfrate, O Bleu, L Dominici, V Ardizzone… - Nature, 2020 - nature.com
Topological physics relies on the structure of the eigenstates of the Hamiltonians. The
geometry of the eigenstates is encoded in the quantum geometric tensor—comprising the …

Experimental measurement of the divergent quantum metric of an exceptional point

Q Liao, C Leblanc, J Ren, F Li, Y Li, D Solnyshkov… - Physical Review Letters, 2021 - APS
The geometry of Hamiltonian's eigenstates is encoded in the quantum geometric tensor
(QGT), containing both the Berry curvature, central to the description of topological matter …

Preformed pairs in flat Bloch bands

M Tovmasyan, S Peotta, L Liang, P Törmä, SD Huber - Physical Review B, 2018 - APS
In a flat Bloch band, the kinetic energy is quenched and single particles cannot propagate
since they are localized due to destructive interference. Whether this remains true in the …

“quantum geometric nesting” and solvable model flat-band systems

Z Han, J Herzog-Arbeitman, BA Bernevig, SA Kivelson - Physical Review X, 2024 - APS
We introduce the concept of “quantum geometric nesting”(QGN) to characterize the
idealized ordering tendencies of certain flat-band systems implicit in the geometric structure …

Superfluid weight bounds from symmetry and quantum geometry in flat bands

J Herzog-Arbeitman, V Peri, F Schindler, SD Huber… - Physical review …, 2022 - APS
Flat-band superconductivity has theoretically demonstrated the importance of band topology
to correlated phases. In two dimensions, the superfluid weight, which determines the critical …

Semiclassical wave packet dynamics in nonuniform electric fields

MF Lapa, TL Hughes - Physical Review B, 2019 - APS
We study the semiclassical theory of wave packet dynamics in crystalline solids extended to
include the effects of a nonuniform electric field. In particular, we derive a correction to the …

Topological Properties of a Non‐Hermitian Quasi‐1D Chain with a Flat Band

C Martínez‐Strasser, MAJ Herrera… - Advanced Quantum …, 2024 - Wiley Online Library
The spectral properties of a non‐Hermitian quasi‐1D lattice in two of the possible
dimerization configurations are investigated. Specifically, it focuses on a non‐Hermitian …

Quantum metric and effective mass of a two-body bound state in a flat band

P Törmä, L Liang, S Peotta - Physical Review B, 2018 - APS
We consider two-body bound states in a flat band of a multiband system. The existence of
pair dispersion predicts the possibility of breaking the degeneracy of the band and creating …