3 papers
math-ph2026
Free Fermion frustration-free models have zero Hall conductance
Sven Bachmann, Zhiqian Du, Martin Fraas
We give a new proof that translation-invariant free Fermion frustration-free models have zero Hall conductance. Our proof is analytic in nature and it uses the bulk-edge correspond…
cs.CL2026
Hylog: A Hybrid Approach to Logging Text Production in Non-alphabetic Scripts
Roberto Crotti, Giovanni Denaro, Zhiqiang Du +1
Research keyloggers are essential for cognitive studies of text production, yet most fail to capture the on-screen transformations performed by Input Method Editors (IMEs) for non-…
math-ph2025
Gaussian filters in quantum lattice systems: Applications to spectral flow, local perturbations, clustering, and the quantum Hall effect
Sven Bachmann, Zhiqian, Du +2
We consider the locality and spectral properties of the smearing \[ τ_f(A) = \int_{-\infty}^\infty dt \, f(t) \, τ_t(A) \] when applied to the dynamics of quantum spin system…