3 papers
cond-mat.str-el2020
A Computer Code for Topological Quantum Spin Systems over Triangulated Surfaces
Yingkai Liu, Emil Prodan
We derive explicit closed-form matrix representations of Hamiltonians drawn from tensored algebras, such as quantum spin Hamiltonians. These formulas enable us to soft-code generic…
quant-ph2019
Topological numbers of Happer model with "puzzling" degeneracy in periodic magnetic field
Yingkai Liu, Yifei Liu, Li-Wei Yu
The Happer model, as the variation of Rabi-Breit model, describes the interactions between the total nuclear spin and the total electron spin-1 of the triplet dimer molecules of ${…
cond-mat.str-el2019
Braiding Flux-Tubes in Topological Quantum and Classical Lattice Models from Class-D
Yifei Liu, Yingkai Liu, Emil Prodan
We use magnetic flux-tubes to stabilize zero-energy modes in a lattice realization of a 2-dimensional superconductor from class D of classification table of topological condensed m…