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Nuclear Theory·nucl-th

Monday·January 5, 2026

6 papers—3 primary·3 cross-listed

All6Primary3Cross-lists3
  1. 04

    [Submitted on 30 Dec 2025] (cross-list from hep-lat)

    Implementing the three-neutron quantization condition

    Wilder Schaaf🇺🇸 · Stephen R. Sharpe🇺🇸

    We describe in detail the implementation of the relativistic three-neutron finite-volume quantization condition derived in Ref. [1]. In particular, we show how the complications due to Wigner rotations acting on spins are included, and present concrete formulas for the case when the angular momenta within pairs is restricted to be less than 2. We describe the symmetries of the matrices appearing in the quantization condition, and decompose solutions into irreducible representations of the appropriate doubled finite-volume symmetry groups. We present an implementation of the three-particle K matrix, keeping the two lowest-order terms in the threshold expansion. We provide numerical predictions for the finite-volume spectrum for a setup with nearly physical parameters, including two-particle interactions that are based on experimental results. This exploratory study shows the how lattice QCD calculations of the three-neutron spectrum with sufficient precision can provide detailed information on both two- and three-particle interactions.

    Comments:
    50 pages including references, 8 figures. v2: several clarifications added; results unchanged
    Subjects:
    High Energy Physics — Lattice (hep-lat); Nuclear Theory (nucl-th)
    arXiv:
    2512.24508 [pdf]
    JHEP(2026)·3 citations
  2. 05

    [Submitted on 1 Jan 2026] (cross-list from quant-ph)

    The Maximal Entanglement Limit in Statistical and High Energy Physics

    Dmitri E. Kharzeev🇺🇸

    These lectures advocate the idea that quantum entanglement provides a unifying foundation for both statistical physics and high-energy interactions. I argue that, at sufficiently long times or high energies, most quantum systems approach a Maximal Entanglement Limit (MEL) in which phases of quantum states become unobservable, reduced density matrices acquire a thermal form, and probabilistic descriptions emerge without invoking ergodicity or classical randomness. Within this framework, the emergence of probabilistic parton model, thermalization in the break-up of confining strings and in high-energy collisions, and the universal small behavior of structure functions arise as direct consequences of entanglement and geometry of high-dimensional Hilbert space.

    Comments:
    final published version; 70 pages, 11 figures; Lectures at the 65th Jubilee Cracow School of Theoretical Physics, Zakopane, Tatra mountains, Poland, June 14-21, 2025
    Subjects:
    Quantum Physics (quant-ph); High Energy Physics — Phenomenology (hep-ph); High Energy Physics — Theory (hep-th); Nuclear Experiment (nucl-ex); Nuclear Theory (nucl-th)
    arXiv:
    2601.00405 [pdf]
    Acta Phys.Polon.B(2026)·7 citations
  3. 06

    [Submitted on 2 Jan 2026] (cross-list from hep-th)

    Effective field theory for dissipative photons from higher-form symmetries

    Genki Yoshimura🇯🇵 · Yukinao Akamatsu🇯🇵 · Yuji Hirono🇯🇵

    Recent developments in generalized symmetries have provided new insights into quantum field theories. Within this framework, photons can be understood as Nambu-Goldstone modes associated with a spontaneously broken higher-form symmetry. In this work, we develop an effective field theory that builds on this symmetry structure to describe the real-time dynamics of photons in insulating media at finite temperature. Combining the Schwinger-Keldysh formalism with the generalized coset construction, we formulate a symmetry-based effective action that incorporates both conservative and dissipative effects. The effective theory implements the dynamical Kubo-Martin-Schwinger symmetry, ensuring consistency with the fluctuation-dissipation relation and Onsager's reciprocal relations. Within this framework, we derive the entropy current associated with dissipative photon dynamics and demonstrate the non-negativity of its divergence, in accordance with the second law of thermodynamics. We also clarify the symmetry origin of the gauge redundancy in the unbroken phase within the Schwinger-Keldysh framework, relating it to strong and weak realizations of higher-form symmetries. Our results provide a model-independent effective description of photon dynamics in insulating media at finite temperature.

    Comments:
    48 pages, no figures, includes appendix
    Subjects:
    High Energy Physics — Theory (hep-th); Mesoscale and Nanoscale Physics (cond-mat.mes-hall); Strongly Correlated Electrons (cond-mat.str-el); High Energy Physics — Phenomenology (hep-ph); Nuclear Theory (nucl-th)
    arXiv:
    2601.00605 [pdf]
    JHEP(2026)·3 citations

Affiliations

first authorsco-authorsvia INSPIRE