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Hamiltonian Truncation Framework for Gauge Theories on the Interval
Rachel Houtz, James Ingoldby
https://arxiv.org/abs/2509.17890 https://arxiv.org/pdf/250…

Hamiltonian Truncation Framework for Gauge Theories on the Interval
In this work, we investigate gauge theories in two dimensions nonperturbatively using the Hamiltonian truncation approach. Working on a spatial interval and adopting the axial gauge, we remove all gauge field degrees of freedom and express the interacting Hamiltonian in the eigenbasis of the free Dirac theory, truncated at a finite energy. As a benchmark we analyse the Schwinger model, where our numerical spectra agree closely with the exact results from bosonization across a wide range of coup…