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Nuclear Theory·nucl-th

Friday·November 17, 2023

7 papers—4 primary·3 cross-listed

All7Primary4Cross-lists3
  1. 01

    [Submitted on 15 Nov 2023]

    Scattering phase shifts from a quantum computer

    Sanket Sharma🇺🇸 · Thomas Papenbrock🇺🇸 · Lucas Platter🇺🇸

    We calculate two-body scattering phase shifts on a quantum computer using a leading order short-range effective field theory Hamiltonian. The algorithm combines the variational quantum eigensolver and the quantum subspace expansion. As an example, we consider scattering in the deuteron S partial wave. We calculate scattering phase shifts with a quantum simulator and on real hardware. We also study how noise impacts these calculations and discuss noise mitigation required to extend our work to larger quantum processing units. With current hardware, up to five superconducting qubits can produce acceptable results, and larger calculations will require a significant noise reduction.

    Comments:
    6 pages, 5 figures
    Subjects:
    Nuclear Theory (nucl-th); Quantum Physics (quant-ph)
    arXiv:
    2311.09298 [pdf]
    PRC(2024)·23 citations
  2. 02

    [Submitted on 16 Nov 2023]

    Exact solution of Boltzmann equation in a longitudinal expanding system

    Shile Chen🇨🇳 · Shuzhe Shi🇨🇳

    Analytical solutions to the microscopic Boltzmann equation are useful in testing the applicability and accuracy of macroscopic hydrodynamic theory. In this work, we present exact solutions of the relativistic Boltzmann equation, based on a new family of exact solutions of the relativistic ideal hydrodynamic equations [Phys. Rev. C 105, L021902].. To the best of our knowledge, this is the first exact solution that allows longitudinal expansion with broken boost invariance.

    Subjects:
    Nuclear Theory (nucl-th); High Energy Physics — Phenomenology (hep-ph)
    arXiv:
    2311.09575 [pdf]
    PRC(2024)·8 citations
  3. 03

    [Submitted on 16 Nov 2023]

    Antineutrino Opacity in Neutron Stars in the Models Constrained by Recent Terrestrial Experiments and Astrophysical Observations

    Parada. T. P. Hutauruk🇰🇷

    In the present paper, we investigate neutral current (NC) antineutrino scattering with the constituents of neutron star (NS) matter at zero temperature. The modeling of standard matter in NS is constructed within the framework of both extended relativistic mean-field (E-RMF) and nonrelativistic Korea-IBS-Daegu-SKKU energy density functional (KIDS-EDF) models. In the E-RMF model, we use a new parameter, G3(M), which was constrained by the recent PREX II experiment measurement of neutron distribution in , while the KIDS-EDF models are constrained by terrestrial experiments, gravitational-wave signals, and astrophysical observations. Using both realistic and well-constrained matter models, we then calculate the antineutrino differential cross-section (ADCS) and antineutrino mean free path (AMFP) for the interaction between antineutrinos and neutron star (NS) matter constituents using linear response theory. It is found that the AMFP for the KIDS0 and KIDSA models are smaller compared to the SLy4 model and the E-RMF model with the G3(M) parameter. The AMFP result of the Skyrme model with the SLy4 parameter set is found to have a prediction almost similar to that of the E-RMF model with the G3(M) parameter. Contributions of each nucleon to the total AMFP are also presented for the G3(M) model.

    Comments:
    14 pages, 18 figures, and 3 tables, invited to submit to MDPI Astronomy Journal, Published version of MDPI Astronomy Journal
    Subjects:
    Nuclear Theory (nucl-th); High Energy Astrophysical Phenomena (astro-ph.HE); Solar and Stellar Astrophysics (astro-ph.SR); High Energy Physics — Phenomenology (hep-ph)
    arXiv:
    2311.09986 [pdf]
    Astronomy(2024)·4 citations
  4. 04

    [Submitted on 16 Nov 2023]

    FENDL: A library for fusion research and applications

    G. Schnabel🇦🇹 · D.L. Aldama🇨🇺 · T. Bohm🇺🇸 · U. Fischer🇩🇪 · S. Kunieda🇯🇵 · A. Trkov🇬🇧 · C. Konno🇯🇵 · R. Capote🇦🇹 · A.J. Koning🇦🇹 · S. Breidokaite🇷🇺 · T. Eade🇬🇧 · M. Fabbri and 19 other authors

    The Fusion Evaluated Nuclear Data Library (FENDL) is a comprehensive and validated collection of nuclear cross section data coordinated by the International Atomic Energy Agency (IAEA) Nuclear Data Section (NDS). FENDL assembles the best nuclear data for fusion applications selected from available nuclear data libraries and has been under development for decades. FENDL contains sub-libraries for incident neutron, proton, and deuteron cross sections including general purpose and activation files used for particle transport and nuclide inventory calculations. We describe the history, selection of evaluations for the various sub-libraries (neutron, proton, deuteron) with the focus on transport and reactor dosimetry applications, the processing of the nuclear data for application codes, and the development of the TENDL-2017 library which is the currently recommended activation library for FENDL. We briefly describe the IAEA IRDFF library as the recommended library for dosimetry fusion applications. We also present work on validation of the neutron sub-library using a variety of fusion relevant computational and experimental benchmarks. A variety of cross section libraries are used for the validation work including FENDL-2.1, FENDL-3.1d, FENDL-3.2, ENDF/B-VIII.0, and JEFF-3.2 with the emphasis on the FENDL libraries. The results of the experimental validation showed that the performance of FENDL-3.2b is at least as good and in most cases better than FENDL-2.1. Future work will consider improved evaluations developed by the International Nuclear Data Evaluation Network (INDEN). Additional work will be needed to investigate differences in gas production in structural materials. Covariance matrices need to be updated to support the development of fusion technology. Additional validation work for high-energy neutrons, protons and deuterons, and the activation library will be needed.

    Comments:
    81 pages, 114 figures
    Subjects:
    Nuclear Theory (nucl-th); cs.DL (cs.DL); Nuclear Experiment (nucl-ex)
    arXiv:
    2311.10063 [pdf]
    Nucl.Data Sheets(2024)·5 citations
  5. 05

    [Submitted on 16 Nov 2023] (cross-list from astro-ph.HE)

    PSR J and GW170817: Direct Multimessenger Constraints on Neutron Star Equation of State through a Novel Wide-ranging Correlation

    Lan Guo · YiFei Niu

    Our knowledge about neutron star (NS) masses is renewed once again due to the recognition of the heaviest NS PSR J. By taking advantage of both mass observations of super massive neutron stars and the tidal deformability derived from event GW170817, a joint constraint on tidal deformability is obtained. A wide-ranging correlation between NS pressure and tidal deformability within the density range from saturation density to is discovered, which directly yields a constrained NS EoS. The newly constrained EoS has a small uncertainty and a softer behavior at high densities without the inclusion of extra degrees of freedom, which shows its potential to be used as an indicator for the component of NS core.

    Comments:
    4 pages, 4 figures
    Subjects:
    High Energy Astrophysical Phenomena (astro-ph.HE); Nuclear Theory (nucl-th)
    arXiv:
    2311.09792 [pdf]
    PRC(2024)·3 citations
  6. 06

    [Submitted on 16 Nov 2023] (cross-list from nucl-ex)

    Measurements of the lightest hypernucleus (): progress and perspective

    Jinhui Chen🇨🇳 · Xin Dong🇺🇸 · Yu-Gang Ma🇨🇳 · Zhangbu Xu🇺🇸

    The hyperon-nucleon (-) interaction is important for the description of the equation-of-state of high baryon density matter. Hypernuclei, the cluster object of nucleons and hyperons, serve as cornerstones of a full understanding of the - interaction. Recent measurements of the lightest known hypernucleus, the hypertriton's () and anti-hypertriton's () lifetime, mass and separation energy have attracted interests on the subject. Its cross section and collective flow parameters have also been measured in heavy-ion collisions, which have revealed new features on its production mechanism. In this article we summarise recent measurements of , focusing on the heavy-ion collisions. We will discuss their implications for the properties and the constrains on the - interaction models.

    Comments:
    12 pages, 10 figures, mini-review for Sci Bulletin
    Subjects:
    Nuclear Experiment (nucl-ex); Nuclear Theory (nucl-th)
    arXiv:
    2311.09877 [pdf]
    Sci.Bull.(2023)·39 citations
  7. 07

    [Submitted on 16 Nov 2023] (cross-list from hep-ph)

    Speed of sound and polytropic index in QCD matter

    He Liu🇨🇳 · Yong-Hang Yang🇨🇳 · Chi Yuan🇨🇳 · Min Ju🇨🇳 · Xu-Hao Wu🇨🇳 · Peng-Cheng Chu🇨🇳

    We investigate the speed of sound and polytropic index of quantum chromodynamics (QCD) matter in the full phase diagram based on a 3-flavor Polyakov-looped Nambu-Jona-Lasinio (pNJL) model. The speed of sound and polytropic index in isothermal and adiabatic cases all have a dip structure at the low chemical potential side of the chiral phase transition boundary, and these quantities reach their global minimum values at the critical endpoint (CEP) but are not completely zero, where the values in adiabatic are lightly greater than those in isothermal. Different from the speed of sound, the polytropic index also exists a peak around the chiral phase transition boundary. Along the hypothetical chemical freeze-out lines, the speed of sound rapidly decreases near the CEP, followed by a small spinodal behavior, while the polytropic index, especially in isothermal, exhibits a more pronounced and nearly closed to zero dip structure as it approaches the CEP.

    Comments:
    7 pages, 5 figures
    Subjects:
    High Energy Physics — Phenomenology (hep-ph); Nuclear Theory (nucl-th)
    arXiv:
    2311.10059 [pdf]
    PRD(2024)·11 citations

Affiliations

first authorsco-authorsvia INSPIRE