10 papers · 1 filter
Electrically Tunable Valley-Based Qubits in Moiré Quantum Dots
Yasser Saleem, Pawel Potasz, Ewelina M. Hankiewicz
The search for scalable, electrically controlled qubits remains a central challenge in quantum technology. We introduce gate-defined moiré quantum dots as a promising platform for…
Machine learning prediction of the convergence criterion for a topological invariant of finite non-Hermitian chains
Raghav Chaturvedi, Viktor Könye, Ewelina M. Hankiewicz
A topological invariant based on polar-decomposition of matrices correctly captures the topology of finite non-Hermitian chains exhibiting the non-Hermitian skin effect, provided t…
Topological Edge States Emerging from Twisted Moiré Bands
Yasser Saleem, PaweÅ Potasz, Anna DyrdaÅ +2
We study twisted bilayer WSe within a continuum moiré model and introduce a method for treating finite geometries directly in the continuum framework, overcoming limitations a…
Interfering trajectories in a ballistic Andreev cavity
Pankaj Mandal, Marcel Kaschper, Fernando Dominguez +9
The conventional description of transport through the interface between a normal conductor and a superconductor reduces the system to a one-dimensional problem treating Andreev ref…
Non-Hermitian topology of quantum spin-Hall systems to detect edge-state polarization
Raghav Chaturvedi, Ion Cosma Fulga, Jeroen van den Brink +1
We study the non-Hermitian topology of multi-terminal transport in a quantum spin-Hall device described by the Bernevig-Hughes-Zhang model. We show that breaking time-reversal symm…
Torsional Hall Viscosity of Massive Chern Insulators: Magnetic Field and Momentum Deformations
Ioannis Matthaiakakis, Weizhen Jia, Raffael L. Klees +7
This work focuses on the non-dissipative, parity-odd spin transport of -dimensional relativistic electrons, generated by torsion, and the torsional Hall viscosity $ζ_{\rm H}…