Parton Distribution Functions in the Schwinger model from Tensor Network States

• URL: http://arxiv.org/abs/2504.07508v2
• Date: Sat, 19 Apr 2025 12:52:07 GMT
• Title: Parton Distribution Functions in the Schwinger model from Tensor Network States
• Authors: Mari Carmen Bañuls, Krzysztof Cichy, C. -J. David Lin, Manuel Schneider,
• Abstract summary: We propose implementing the light-front Wilson line within the Hamiltonian formalism using tensor network techniques.<n>We present accurate results for the fermion PDF of the vector meson at varying fermion masses, obtained from first principle calculations directly in Minkowski space.
• Score: 0.08035416719640157
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: Parton distribution functions (PDFs) describe the inner, non-perturbative structure of hadrons. Their computation involves matrix elements with a Wilson line along a direction on the light cone, posing significant challenges in Euclidean lattice calculations, where the time direction is not directly accessible. We propose implementing the light-front Wilson line within the Hamiltonian formalism using tensor network techniques. The approach is demonstrated in the massive Schwinger model (quantum electrodynamics in 1+1 dimensions), a toy model that shares key features with quantum chromodynamics. We present accurate continuum results for the fermion PDF of the vector meson at varying fermion masses, obtained from first principle calculations directly in Minkowski space. Our strategy also provides a useful path for quantum simulations and quantum computing.

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