Speaker
Etsuko Itou
Description
We investigate the entanglement structure of the 2+1-dimensional Z_2 lattice gauge theory using tensor-network methods. We construct gauge-invariant ground state based on the gauged Gaussian PEPS (GGPEPS) ansatz proposed by Zohar et al., which automatically satisfies Gauss’ law. This ansatz enables us to study the theory over a wide range of coupling constants while keeping gauge invariance manifest.
By combining the GGPEPS framework with Grassmann tensor network techniques, we perform accurate numerical calculations of physical observables and entanglement properties.