148 citations · 1.2k across the 33 of their papers we have counts for
4 papers · 1 filter
Topological charge distributions of an interacting two-spin system
György Frank, Dániel Varjas, Péter Vrana +2
Quantum systems are often described by parameter-dependent Hamiltonians. Points in parameter space where two levels are degenerate can carry a topological charge. Here we theoretic…
Amorphous topological phases protected by continuous rotation symmetry
Helene Spring, Anton R. Akhmerov, Daniel Varjas
Protection of topological surface states by reflection symmetry breaks down when the boundary of the sample is misaligned with one of the high symmetry planes of the crystal. We de…
Minimal Zeeman field requirement for a topological transition in superconductors
Kim Pöyhönen, Daniel Varjas, Michael Wimmer +1
Platforms for creating Majorana quasiparticles rely on superconductivity and breaking of time-reversal symmetry. By studying continuous deformations to known trivial states, we fin…
Topological Weaire-Thorpe models of amorphous matter
Quentin Marsal, Daniel Varjas, Adolfo G. Grushin
Amorphous solids remain outside of the classification and systematic discovery of new topological materials, partially due to the lack of realistic models that are analytically tra…