Tight-binding reduction and topological equivalence in strong magnetic fields

J Shapiro, MI Weinstein - Advances in Mathematics, 2022 - Elsevier
Topological insulators (TIs) are a class of materials which are insulating in their bulk form
yet, upon introduction of an a boundary or edge, eg by abruptly terminating the material, may …

Localization of generalized Wannier bases implies Chern triviality in non-periodic insulators

G Marcelli, M Moscolari, G Panati - Annales Henri Poincaré, 2023 - Springer
We investigate the relation between the localization of generalized Wannier bases and the
topological properties of two-dimensional gapped quantum systems of independent …

Triangularized orthogonalization-free method for solving extreme eigenvalue problems

W Gao, Y Li, B Lu - Journal of Scientific Computing, 2022 - Springer
A novel orthogonalization-free method together with two specific algorithms is proposed to
address extreme eigenvalue problems. On top of gradient-based algorithms, the proposed …

Erasure conversion in Majorana qubits via local quasiparticle detection

A Alase, KD Stubbs, BC Sanders, DL Feder - Physical Review Research, 2024 - APS
Quasiparticle poisoning errors in Majorana-based qubits are not suppressed by the
underlying topological properties, which undermines the usefulness of this proposed …

Purely linear response of the quantum Hall current to space-adiabatic perturbations

G Marcelli, D Monaco - Letters in Mathematical Physics, 2022 - Springer
Using recently developed tools from space-adiabatic perturbation theory, in particular the
construction of a non-equilibrium almost-stationary state, we give a new proof that the Kubo …

Algebraic localization implies exponential localization in non-periodic insulators

J Lu, KD Stubbs - arxiv preprint arxiv:2101.02626, 2021 - arxiv.org
Exponentially-localized Wannier functions are a basis of the Fermi projection of a
Hamiltonian consisting of functions which decay exponentially fast in space. In two and three …

Algebraic localization of Wannier functions implies Chern triviality in non-periodic insulators

J Lu, KD Stubbs - Annales Henri Poincaré, 2024 - Springer
For gapped periodic systems (insulators), it has been established that the insulator is
topologically trivial (ie, its Chern number is equal to 0) if and only if its Fermi projector admits …

Exponential suppression of Pauli errors in Majorana qubits via quasiparticle detection

A Alase, KD Stubbs, BC Sanders, DL Feder - arxiv preprint arxiv …, 2023 - arxiv.org
Quasiparticle poisoning errors in Majorana-based qubits are not suppressed by the
underlying topological properties, which undermines the usefulness of this proposed …

Localised module frames and Wannier bases from groupoid Morita equivalences

C Bourne, B Mesland - Journal of Fourier Analysis and Applications, 2021 - Springer
Following the operator algebraic approach to Gabor analysis, we construct frames of
translates for the Hilbert space localisation of the Morita equivalence bimodule arising from …

Ultra-generalized Wannier bases: Are they relevant to topological transport?

M Moscolari, G Panati - Journal of Mathematical Physics, 2023 - pubs.aip.org
We generalize Prodan's construction of radially localized generalized Wannier bases [E.
Prodan, J. Math. Phys. 56 (11), 113511 (2015)] to gapped quantum systems without time …