37 citations · 195 across the 17 of their papers we have counts for
20 papers
Quantum Phase diagrams and transitions for Chern topological insulators
Ralph M. Kaufmann, Mohamad Mousa, Birgit Wehefritz-Kaufmann
Topological invariants such as Chern classes are by now a standard way to classify topological phases. Introducing and varying parameters in such systems leads to phase diagrams, w…
Refined Phase Diagram for a Spin-1 System Exhibiting a Haldane Phase
Mohamad Mousa, Birgit Wehefritz-Kaufmann, Sabre Kais +2
We provide the phase diagram of a 2-parameter spin-1 chain that has a symmetry-protected topological (SPT) Haldane phase using computational algorithms along with tensor-network to…
Using Quantum Annealers to Calculate Ground State Properties of Molecules
Justin Copenhaver, Adam Wasserman, Birgit Wehefritz-Kaufmann
Quantum annealers are an alternative approach to quantum computing which make use of the adiabatic theorem to efficiently find the ground state of a physically realizable Hamiltoni…
Observability of a Sharp Majorana Transition in a Few-Body Model
Jared Bland, Chris H. Greene, Birgit Wehefritz-Kaufmann
We propose experimentally observable signatures of of topological Majorana quasiparticles in the few-body limit of the interacting cold-atom model of [Iemini et al. Phys. Rev. Lett…
Local models and global constraints for degeneracies and band crossings
Ralph M. Kaufmann, Sergei Khlebnikov, Birgit Wehefritz-Kaufmann
We study topological properties of families of Hamiltonians which may contain degenerate energy levels aka. band crossings. The primary tool are Chern classes, Berry phases and sli…
KPZ modes in -dimensional directed polymers
G. M. Schütz, B. Wehefritz-Kaufmann
We define a stochastic lattice model for a fluctuating directed polymer in dimensions. This model can be alternatively interpreted as a fluctuating random path in 2 dimen…