PaperPanorama

HEP Lattice·hep-lat

Fri·Jul 31, 2026

6 papers—4 primary·2 cross-listed

All6Primary4Cross-lists2
  1. 01

    Confinement and String Breaking in the Compact Abelian Higgs Model

    Blake Senseman🇺🇸 · Zane Ozzello🇺🇸 · Yannick Meurice🇺🇸 · Stephen Mrenna🇺🇸

    While real-time simulation of Quantum Chromodynamics remains technologically out of reach, simplified models for studying elements of QCD phenomenology abound. This work presents a simple model, a spin-1 truncation of the Compact Abelian Higgs Model simulated on qutrit sites, in which confinement and string breaking is accessible to current simulation methods. In the low-energy regime of 1+1D scalar electrodynamics, the heavy modes are integrated out, producing a spin chain effective Hamiltonian in which Gauss' law is implicitly satisfied. We study the spectrum of string-like excitations using DMRG methods on the order of 100 sites. We demonstrate that an added, local chemical potential, playing a role analogous to external charges, permits parameter-dependent measurements of physical features of interest like the string tension and effective meson mass. Varying the chemical potential also permits a characterization of string stability not assessed in prior studies of confining lattice models.

    hep-latquant-ph0 citations
  2. 02

    Pion Transition Form Factor in Lattice QCD

    Shihao Su🇺🇸 · Liuming Liu🇨🇳 · Peng Sun🇨🇳

    We investigate the neutral pion transition form factor in lattice QCD and confirm that the connected and disconnected contributions have the same sign. We employ the recently proposed blending method, which supplies an unbiased and cheap estimators for the required all-to-all propagators. The external pion states are treated within the distillation framework, while the electromagnetic currents are evaluated in the full blending space. Numerical tests are performed on an lattice ensemble. Our result shows that the contribution of the disconnected part is approximately of that of the connected part and enables constructive interference of probability amplitudes.

    hep-lat1 citation
  3. 03

    On credit attribution and research software: A case study from lattice QCD

    Alessandro Sciarra🇩🇪

    Questions of authorship, credit attribution, and the recognition of research software contributions have become increasingly prominent in those constantly growing research areas for which software constitutes an essential part of the research process. While general guidelines and best practices exist, their application in concrete situations often raises nontrivial interpretative and procedural issues. This article presents a documented case study from lattice QCD research, illustrating how the development of numerical strategies, long-term software infrastructure, and conceptual extensions of existing work can give rise to complex questions of authorship, priority, and credit attribution. Rather than discussing the underlying scientific results, the focus is on the sequence of events, the role of software as a long-term research infrastructure, and the interaction with established mechanisms for credit attribution and research integrity assessment. The aim of this work is to contribute to transparency and discussion on how current practices and guidelines are applied in realistic collaborative environments, and to highlight structural tensions that may arise between open scientific collaboration, software sustainability, and traditional notions of authorship. The article is intended as a factual account and reflection on research practice, and aims to stimulate discussion on whether additional community standards for recognising long-term research software contributions may be beneficial within lattice QCD.

    hep-lat0 citations
  4. 04

    Exact chiral symmetry with quantum signal processing

    Henry Lamm🇺🇸 · Alessandro Roggero🇮🇹 · Hersh Singh🇺🇸 · Luca Spagnoli🇮🇹

    We give a quantum signal processing (QSP) algorithm for the overlap fermion Hamiltonian which preserves the Ginsparg-Wilson relation up to a controllable error . Quantum simulations of Dirac fermions with exact chiral symmetry are thus nearly free: applying the overlap Hamiltonian costs only a factor logarithmic in more than the Wilson-Dirac Hamiltonian. Comparing to domain-wall fermions, a mild overhead is found in circuit complexity while reducing qubit costs. We show how QSP effectively constructs an extra dimension when simulating the overlap operator, illustrating that the scaling of quantum algorithms reflects the deeper physics of overlap fermions arising at the boundary of domain-wall fermions.

    hep-latnucl-thquant-ph1 citation
  5. 05

    Magnetic dipole moments as probes of doubly-bottom molecular pentaquarks

    Ulaş Özdem🇹🇷

    We investigate the magnetic dipole moments of doubly-bottom pentaquark states with spin-parities and , interpreted as hadronic molecules in the , , and configurations. The analysis is performed within the framework of QCD light-cone sum rules employing photon distribution amplitudes. Our results demonstrate a strong sensitivity of the magnetic dipole moments to the internal spin structure and quark composition of the states. In particular, the light-quark sector provides the dominant contribution in the configuration, while the magnetic moment of is largely governed by the heavy bottom quark. For the molecular state, both light and heavy sectors contribute constructively, leading to a significantly enhanced magnetic dipole moment. These findings indicate that magnetic dipole moments constitute a sensitive probe of the internal structure of molecular-type doubly-bottom pentaquarks and provide testable predictions for future experimental studies.

    ↳ hep-phhep-exhep-lathep-th0 citations
  6. 06

    A regulated zero-temperature construction of the Fundamental Modular Region in pure Yang--Mills theory and QCD

    Rodrigo Carmo Terin🇪🇸

    We formulate the Fundamental Modular Region (FMR) as the zero-temperature limit of regulated copy-weighted Landau gauges. At finite , the measure localizes on absolute minima, and the leading correction is dominated by the inverse Faddeev--Popov (FP) operator. A small benchmark provides a computational realization through population annealing and collective basin hopping. Our construction defines absolute Landau gauge without parametrizing the FMR boundary and extends naturally to full quantum chromodynamics (QCD). It also admits a Hamiltonian interpretation in terms of the gauge-fixed vacuum wave functional on the FMR.

    ↳ hep-thhep-lathep-phnucl-th0 citations

Affiliations

first authorsco-authorsvia INSPIRE