QCD evolution of entanglement entropy

Hentschinski, Martin; Kharzeev, Dmitri E.; Kutak, Krzysztof; Tu, Zhoudunming

doi:10.1088/1361-6633/ad910b

Title: QCD evolution of entanglement entropy

Journal Article · 02 December 2024 · Reports on Progress in Physics

DOI: https://doi.org/10.1088/1361-6633/ad910b · OSTI ID:2483541

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Universidad de las Américas Puebla (UDLAP) (Mexico)
Brookhaven National Laboratory (BNL), Upton, NY (United States)
Polish Academy of Sciences (PAS), Krakow (Poland)

Entanglement entropy has emerged as a novel tool for probing nonperturbative quantum chromodynamics (QCD) phenomena, such as color confinement in protons. While recent studies have demonstrated its significant capability in describing hadron production in deep inelastic scatterings, the QCD evolution of entanglement entropy remains unexplored. Here, in this work, we investigate the differential rapidity-dependent entanglement entropy within the proton and its connection to final-state hadrons, aiming to elucidate its QCD evolution. Our analysis reveals a strong agreement between the rapidity dependence of von Neumann entropy, obtained from QCD evolution equations, and the corresponding experimental data on hadron entropy. These findings provide compelling evidence for the emergence of a maximally entangled state, offering new insights into the nonperturbative structure of protons.

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Research Organization:: Brookhaven National Laboratory (BNL), Upton, NY (United States)

Sponsoring Organization:: USDOE Laboratory Directed Research and Development (LDRD) Program; USDOE Office of Science (SC), Nuclear Physics (NP)

Grant/Contract Number:: SC0012704

OSTI ID:: 2483541

Report Number(s):: BNL--226442-2024-JAAM

Journal Information:: Reports on Progress in Physics, Journal Name: Reports on Progress in Physics Journal Issue: 12 Vol. 87; ISSN 0034-4885

Publisher:: IOP PublishingCopyright Statement

Country of Publication:: United States

Language:: English

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