3 papers
astro-ph.CO2026
Statistical Field Theory for Weak Gravitational Lensing
Zheng Zhang, Philip Bull, Chris Clarkson +1
Standard weak-lensing calculations treat lensing as a linear remapping of the matter field along the line of sight. We instead formulate lensing as a stochastic field theory for th…
physics.comp-ph2026
sft-wick: A formalism and package for Feynman-diagram expansion and evaluation in stochastic field theories
Zheng Zhang
When stochastic field dynamics are cast into a path-integral formulation, perturbation theory becomes systematic but the resulting expansion quickly grows combinatorially large. Th…
cond-mat.mes-hall2025
A Cohomological Framework for Topological Phases from Momentum-Space Crystallographic Groups
T. R. Liu, Zheng Zhang, Y. X. Zhao
Crystallographic groups are conventionally studied in real space to characterize crystal symmetries. Recent work has recognized that when these symmetries are realized projectively…