479 citations · 1.8k across the 32 of their papers we have counts for
8 papers · 1 filter
From Hermitian critical to non-Hermitian point-gapped phases
Carlos Ortega-Taberner, Maria Hermanns
Recent years have seen a growing interest in topological phases beyond the standard paradigm of gapped, isolated systems. One recent direction is to explore topological features in…
Quantization of topological indices in critical chains at low temperatures
Oleksandr Balabanov, Carlos Ortega-Taberner, Maria Hermanns
Various types of topological phenomena at criticality are currently under active research. In this paper we suggest to generalize the known topological quantities to finite tempera…
Polarization and entanglement spectrum in non-hermitian systems
Carlos Ortega-Taberner, Lukas Rødland, Maria Hermanns
The entanglement spectrum is a useful tool to study topological phases of matter, and contains valuable information about the ground state of the system. Here, we study its propert…
On the relation of the entanglement spectrum to the bulk polarization
Carlos Ortega-Taberner, Maria Hermanns
The bulk polarization is a topological invariant characterizing non-interacting systems in one dimension with chiral or particle-hole symmetries. We show that the bu…
Quantum Hall quasielectrons - Abelian and non-Abelian
T. H. Hansson, M. Hermanns, N. Regnault +1
The quasiparticles in Quantum Hall liquids carry fractional charge and obey fractional quantum statistics. Of particular recent interest are those with non-Abelian statistics, sinc…
Hierarchy wave functions--from conformal correlators to Tao-Thouless states
E. J. Bergholtz, T. H. Hansson, M. Hermanns +2
Laughlin's wave functions, describing the fractional quantum Hall effect at filling factors , can be obtained as correlation functions in conformal field theory, and re…
Quantum Hall wave functions on the torus
M. Hermanns, J. Suorsa, E. J. Bergholtz +2
We present explicit expressions for a large set of hierarchy wave functions on the torus. Included are the Laughlin states, the states in the positive Jain series, and recently obs…
Microscopic theory of the quantum Hall hierarchy
E. J. Bergholtz, T. H. Hansson, M. Hermanns +1
We solve the quantum Hall problem exactly in a limit and show that the ground states can be organized in a fractal pattern consistent with the Haldane-Halperin hierarchy, and with…