Tangent fermions: Dirac or Majorana fermions on a lattice without fermion doubling

CWJ Beenakker, A Donís Vela, G Lemut… - Annalen der …, 2023 - Wiley Online Library
Methods to discretize the Hamiltonian of a topological insulator or topological
superconductor, without giving up on the topological protection of the massless excitations …

Helical Luttinger liquid on a space-time lattice

VA Zakharov, J Tworzydło, CWJ Beenakker… - Physical Review Letters, 2024 - APS
The Luttinger model is a paradigm for the breakdown due to interactions of the Fermi liquid
description of one-dimensional massless Dirac fermions. Attempts to discretize the model on …

Geometry-independent tight-binding method for massless Dirac fermions in two dimensions

A Ziesen, IC Fulga, F Hassler - Physical Review B, 2023 - APS
The Nielsen-Ninomiya theorem, dubbed “fermion doubling,” poses a problem for the naive
discretization of a single (massless) Dirac cone on a two-dimensional surface. The …

Topologically protected Casimir effect for lattice fermions

CWJ Beenakker - Physical Review Research, 2024 - APS
The electromagnetic Casimir effect has a fermionic counterpart in topological insulators:
Zero-point fluctuations of a massless Dirac fermion field mediate a force between magnetic …

Computational quantum transport

X Waintal, M Wimmer, A Akhmerov, C Groth… - arXiv preprint arXiv …, 2024 - arxiv.org
This review is devoted to the different techniques that have been developed to compute the
coherent transport properties of quantum nanoelectronic systems connected to electrodes …

Majorana bound states in encapsulated bilayer graphene

F Peñaranda, R Aguado, E Prada, P San-Jose - SciPost Physics, 2023 - scipost.org
The search for robust topological superconductivity and Majorana bound states continues,
exploring both one-dimensional (1D) systems such as semiconducting nanowires and two …

Massless Dirac Fermions on a Space‐Time Lattice with a Topologically Protected Dirac Cone

A Donís Vela, MJ Pacholski, G Lemut… - Annalen der …, 2022 - Wiley Online Library
The symmetries that protect massless Dirac fermions from a gap opening may become
ineffective if the Dirac equation is discretized in space and time, either because of scattering …

Effect of uncorrelated on-site scalar potential and mass disorder on transport of two-dimensional Dirac fermions

A Duha, MF Borunda - Physical Review B, 2024 - APS
We investigate the transport properties of massive Dirac fermions subjected to uncorrelated
scalar potential disorder, and mass disorder. Using a finite difference method, the …

Luttinger liquid tensor network: Sine versus tangent dispersion of massless Dirac fermions

VA Zakharov, S Polla, A Donís Vela, P Emonts… - Physical Review …, 2024 - APS
To apply the powerful many-body techniques of tensor networks to massless Dirac fermions,
one wants to discretize the p· σ Hamiltonian and construct a matrix-product-operator (MPO) …

Reflectionless Klein tunneling of Dirac fermions: comparison of split-operator and staggered-lattice discretization of the Dirac equation

AD Vela, G Lemut, MJ Pacholski… - Journal of Physics …, 2022 - iopscience.iop.org
Massless Dirac fermions in an electric field propagate along the field lines without
backscattering, due to the combination of spin-momentum locking and spin conservation …