3 papers
math-ph2026
Hidden Dyson Universality in Inverse-Spectral Geometry
Momo Hayashi, Kazumitsu Sakai
Dyson universality typically manifests itself in local eigenvalue statistics. Here we show that its signature survives a nonlinear inverse-spectral reconstruction and reappears in…
quant-ph2026
Perfect transmission and parallel composition for quantum walks on graphs with two leads
Allan John Gerrard, Ryo Asaka, Kazumitsu Sakai
We study scattering for continuous-time quantum walks on finite graphs with two attached leads. We derive explicit formulae for the two-terminal scattering matrix in terms of chara…
cond-mat.stat-mech2023
Spin Drude weight for the integrable XXZ chain with arbitrary spin
Shinya Ae, Kazumitsu Sakai
Using generalized hydrodynamics (GHD), we exactly evaluate the finite-temperature spin Drude weight at zero magnetic field for the integrable XXZ chain with arbitrary spin and easy…