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Charge and spin density in the helical Luttinger liquid
N. Traverso Ziani, C. Fleckenstein, F. Crépin +1
The weakly interacting helical Luttinger liquid, due to spin momentum locking, is characterized by extremely peculiar local observables: we show that the density-density correlatio…
Interacting weak topological insulators and their transition to Dirac semimetal phases
Gang Li, Werner Hanke, Giorgio Sangiovanni +1
Topological insulators in the presence of strong Coulomb interaction constitute novel phases of matter. Transitions between these phases can be driven by single-particle or many-bo…
Evidence for broken Galilean invariance at the quantum spin Hall edge
Florian Geissler, François Crépin, Björn Trauzettel
We study transport properties of the helical edge channels of a quantum spin Hall (QSH) insulator, in the presence of electron-electron interactions and weak, local Rashba spin-orb…
Flux sensitivity of quantum spin Hall rings
François Crépin, Björn Trauzettel
We analyse the periodicity of persistent currents in quantum spin Hall loops, partly covered with an -wave superconductor, in the presence of a flux tube. Much like in normal (n…
Equilibration in closed quantum systems: Application to spin qubits
Daniel Hetterich, Moritz Fuchs, Björn Trauzettel
We study an observable-based notion of equilibration and its application to realistic systems like spin qubits in quantum dots. On the basis of the so-called distinguishability, we…
Fractional Wigner crystal in the helical Luttinger liquid
N. Traverso Ziani, F. Crépin, B. Trauzettel
The properties of the strongly interacting edge states of two dimensional topological insulators in the presence of two particle backscattering are investigated. We find an anomalo…