Work

Quantum entanglement correlations in double quark PDFs

Year: 2025

Type: article

Abstract: Methods from Quantum Information Theory are used to scrutinize quantum correlations encoded in the two-quark density matrix over light-cone momentum fractions x 1 and x 2 . A nonperturbative three quark model light-cone wavefunction predicts significant nonclassical correlations associated with the “entanglement negativity” measure for asymmetric and small quark momentum fractions. We perform one step of QCD scale evolution of the entire density matrix, not just its diagonal (dPDF), by computing collinearly divergent corrections due to the emission of a gluon. Finally, we present first qualitative numerical results for single-step scale evolution of quantum entanglement correlations in double quark PDFs. At a higher Q 2 scale, the nonclassical correlations manifest in the dPDF for nearly symmetric momentum fractions.

Source: Physical review. D/Physical review. D.

DOI: 10.1103/ngdx-pc85

Authors: Adrian Dumitru, Eric Kolbusz

Institutions: The Graduate Center, CUNY, Baruch College, City University of New York

Language: English

Topic: Quantum Chromodynamics and Particle Interactions

Subfield: Nuclear and High Energy Physics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: hybrid

Funders: U.S. Department of Energy, Nuclear Physics

Awards: G1819392837, NEW; HIGH-ENERGY QCD IN HEAVY-ION COLLISIONS; PI - JAMAL JALILIAN-MARIAN