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Nuclear Theory·nucl-th

Monday·July 20, 2026

8 papers—4 primary·4 cross-listed

All8Primary4Cross-lists4
  1. 05

    [Submitted on 16 Jul 2026] (cross-list from quant-ph)

    Collective Enhancement of Nuclear Excitation for a Nuclear Quantum Battery

    Pravin Kumar Dahal · Kieran Hymas · Jack Muir · James Q. Quach

    Current implementations of quantum batteries are constrained by limited energy density and short retention times associated with the electronic or molecular excitations. Here we propose a nuclear quantum battery based on collective excitation of the Fe nuclei of density embedded in a planar hard X-ray waveguide. Using a Green function waveguide-QED description, we study charging via excitation beyond linear response, where saturation and drive back-action reshape the incident pulse. We introduce a self-consistent waveform-engineering protocol that inhibits local radiative decay in the waveguide thus promoting absorption into high-lying collective nuclear excitation manifolds. We show an enhanced excitation cross section of the nuclear ensemble which yields superlinear charging, with maximum studied energy density scaling approximately like . Our results provide a route to high-energy-density quantum charging at hard X-ray energies using contemporary X-ray sources and waveguide architectures by identifying nonlinear, collectively enhanced absorption as a key mechanism for nuclear quantum battery operation.

    Comments:
    10 pages, 4 figures; Comments Welcome!
    Subjects:
    Quantum Physics (quant-ph); Nuclear Theory (nucl-th)
    arXiv:
    2607.15319 [pdf]
    0 citations
  2. 06

    [Submitted on 16 Jul 2026] (cross-list from hep-ph)

    Solar-System Abundances of -Nuclides Probe Collective Neutrino Oscillations in Supernovae

    Alexander Friedland🇺🇸 · Derek J. Li🇺🇸 · Giuseppe Lucente🇺🇸 · Payel Mukhopadhyay🇺🇸 · Ian Padilla-Gay🇺🇸 · Amol V. Patwardhan🇺🇸

    Direct evidence for collective neutrino oscillations in core-collapse supernovae remains elusive. We show that this quantum phenomenon leaves a footprint on the abundance pattern of proton-rich nuclides in the solar system. Modeling the -process using a progenitor, we map out the dependence of the total yields on the starting radius of the oscillations, self-consistently coupling hydrodynamics and nucleosynthesis. The oscillations boost key -nuclides (, ) and long-lived by up to two orders of magnitude, bringing their abundances into agreement with the observations. The best match is found when oscillations commence within of the proto-neutron star surface, indicating fast collective oscillations.

    Comments:
    10 pages, 3 figures plus Supplemental Material with 11 pages, 8 figures, 1 table
    Subjects:
    High Energy Physics — Phenomenology (hep-ph); High Energy Astrophysical Phenomena (astro-ph.HE); Solar and Stellar Astrophysics (astro-ph.SR); Nuclear Theory (nucl-th)
    arXiv:
    2607.15392 [pdf]
    2 citations
  3. 07

    [Submitted on 17 Jul 2026] (cross-list from hep-ph)

    Nonequilibrium approach to heavy-quark transport

    Juhee Hong🇰🇷

    A nonequilibrium Green's function approach to heavy-quark transport is discussed within the framework of the Kadanoff-Baym equation. One- and two-loop self-energy diagrams with hard-thermal-loop resummed propagators are calculated in the real-time formalism. Under the quasiparticle approximation, the kinetic equation reduces to the Boltzmann equation that accounts for elastic scattering and medium-induced gluon emission from a single scattering. Numerical studies suggest that off-shell and memory effects in quark-gluon plasmas influence heavy-quark dynamics, particularly near the critical temperature.

    Comments:
    17 pages, 6 figures
    Subjects:
    High Energy Physics — Phenomenology (hep-ph); Nuclear Theory (nucl-th)
    arXiv:
    2607.15618 [pdf]
    0 citations
  4. 08

    [Submitted on 17 Jul 2026] (cross-list from nucl-ex)

    Rapid structural evolution of neutron-rich silicon isotopes toward N = 28

    G. L. Zimba · H. Iwasaki · B. A. Brown · Y. Utsuno · N. Shimizu · N. Aoi · M. Basson · T. Beck · J. Chen · J. Chung-Jung · A. Douglas · A. Ertoprak and 18 other authors

    Neutron-rich Si isotopes represent a unique case of shell evolution, exhibiting a robust shell closure at and pronounced quadrupole collectivity at . We report lifetime measurements of excited states in Si and the first simultaneous lifetime and heavy-ion inelastic-scattering measurements in Si. In Si, the extracted lifetimes for the and states indicate moderate quadrupole collectivity at , together with signatures of triaxiality. In Si, two near-degenerate states at 570 and 658~keV exhibit comparable strengths as extracted from inelastic scattering, while the measured lifetimes indicate dominant decays. The combined lifetime and inelastic-scattering results suggest an evolution toward oblate shape, consistent with large-scale shell-model predictions.

    Subjects:
    Nuclear Experiment (nucl-ex); Nuclear Theory (nucl-th)
    arXiv:
    2607.16174 [pdf]
    0 citations

Affiliations

first authorsco-authorsvia INSPIRE