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Nuclear Theory·nucl-th

Monday·December 2, 2024

14 papers—9 primary·5 cross-listed

All14Primary9Cross-lists5
  1. 10

    Quantum computing of chirality imbalance in SU(2) gauge theory

    Guofeng Zhang🇨🇳 · Xingyu Guo🇨🇳 · Enke Wang🇨🇳 · Hongxi Xing (QuNu Collaboration)🇨🇳

    We implement a variational quantum algorithm to investigate the chiral condensate in a 1+1 dimensional SU(2) non-Abelian gauge theory. The algorithm is evaluated using a proposed Monte Carlo sampling method, which allows the extension to large qubit systems. The obtained results through quantum simulations on classical and actual quantum hardware are in good agreement with exact diagonalization of the lattice Hamiltonian, revealing the phenomena of chiral symmetry breaking and restoration as functions of both temperature and chemical potential. Our findings underscore the potential of near-term quantum computing for exploring QCD systems at finite temperature and density in non-Abelian gauge theories.

    ↳ hep-phhep-lathep-thnucl-th+1PRD(2025)·7 citations
  2. 11

    Heavy quarkonium dissociation in the presence of magnetic field and anisotropy using dissociation energy criterion

    Rishabh Sharma🇮🇳 · Siddhartha Solanki🇮🇳 · Manohar Lal🇮🇳 · Vineet Kumar Agotiya🇮🇳

    In this article, we have studied the dissociation temperature of 1S and 2S states of heavy quarkonium in the presence of anisotropy and a strong magnetic field background using the dissociation energy criterion. We utilized the medium-modified form of the Cornell potential, which depends on temperature as well as the anisotropic parameter {\xi} and the magnetic field. The binding energy (B.E.) and dissociation energy (D.E.) of heavy quarkonium have been examined for different values of the magnetic field and anisotropy. It is noted that B.E. starts decreasing from higher values as we increase the anisotropy, while D.E. exhibits the opposite behavior. The dissociation temperature appears to increase with anisotropy, while it decreases with the magnetic field, as shown in Table 1 and 2 respectively. These results align well with recent research findings.

    ↳ hep-phnucl-thIndian J.Phys.(2025)·1 citation
  3. 12

    Centre vortex evidence for a second finite-temperature QCD transition

    Jackson A. Mickley🇦🇺 · Chris Allton🇬🇧 · Ryan Bignell🇮🇪 · Derek B. Leinweber🇦🇺

    Evidence for the existence of a second finite-temperature transition in quantum chromodynamics (QCD) is obtained through the study of centre vortex geometry and its evolution with temperature. The dynamical anisotropic ensembles of the FASTSUM Collaboration are utilised to conduct a comprehensive analysis at eight temperatures beyond the established chiral transition. Visualisations of the centre vortex structure in temporal and spatial slices of the lattice reveal that vortex percolation persists through the chiral transition and ceases at a temperature that is approximately twice the chiral transition temperature . This implies that confinement is retained through temperatures up to , pointing toward a second transition corresponding to deconfinement. The loss of percolation is quantified by the vortex cluster extent, providing a clear signal for the deconfinement transition. Additional vortex statistics, including temporal correlations, vortex and branching point densities, the number of secondary clusters and vortex chain lengths between branching points, are scrutinised as a function of temperature. All ten measures investigated herein show the characteristics of two transitions in QCD, encompassing the chiral transition at and the deconfinement transition at . Performing an inflection point analysis on the vortex and branching point densities produces an estimate of that agrees with the known FASTSUM value. By the same procedure, a precise estimate of the deconfinement point is extracted as MeV.

    ↳ hep-lathep-phhep-thnucl-thPRD(2025)·30 citations
  4. 13

    Spin polarization for massive fermion in a shear flow: complete results at

    Ziyue Wang🇨🇳 · Shu Lin🇨🇳

    Motivated by the key role of shear induced polarization in understanding the local spin polarization puzzle of hyperons in heavy ion collisions, we perform a complete analysis of spin polarization of massive fermion in a quantum electrodynamic plasma with shear flow. Apart from the well-known spin-shear coupling in free theory, we include two more collision dependent contributions: one is a non-dynamical contribution fixed by shifted spin-averaged distribution in steady state; the other is a dynamical contribution following from spin evolution. Despite of the dependencies on collision, we find the dependencies on coupling drop out in the final results. These contributions can lead to significant enhancement of the spin-shear coupling in phenomenologically interesting regime.

    ↳ hep-phnucl-thPRD(2025)·13 citations
  5. 14

    Collective dynamics in heavy and light-ion collisions -- II) Determining the origin of collective behavior in high-energy collisions

    Victor E. Ambrus🇷🇴 · Sören Schlichting🇩🇪 · Clemens Werthmann🇩🇪

    Exploiting the first measurements of the same ion species in OO collisons at RHIC and LHC, we propose an observable to distinguish whether collective behavior builds up through a hydrodynamic expansion of a strongly interacting QGP or few final state re-scatterings. Our procedure allows to disentangle the effects of the initial state geometry and the dynamical response mechanism on anisotropic flow. We validate its ability to discriminate between systems with different interaction rates using results from event-by-event simulations in kinetic theory.

    ↳ hep-phnucl-thPRD(2025)·11 citations

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first authorsco-authorsvia INSPIRE