PaperPanorama

HEP Lattice·hep-lat

Thu·Aug 13, 2026

3 papers—1 primary·2 cross-listed

All3Primary1Cross-lists2
  1. 01

    Real-time topological rate at non-zero momentum in quenched QCD

    Claudio Bonanno🇨🇭 · Massimo D'Elia🇮🇹 · Roberto Dionisio🇮🇹 · Giuseppe Gagliardi🇮🇹 · Andrea Giorgieri🇮🇹 · Francesco Sanfilippo🇮🇹 · Alessandra Valentino🇮🇹 · Giovanni Villadoro🇮🇹

    We present a proof-of-concept numerical study of the real-time topological rate at non-zero momentum in quenched lattice QCD at a temperature MeV, as an important step toward the determination of this quantity in full QCD. Our strategy, already applied to compute the sphaleron rate in pure Yang--Mills and in full QCD, extracts the rate from the resolution of an appropriate inverse problem, solved applying the Hansen--Lupo--Tantalo (HLT) method to the thermal Euclidean time-correlator of the topological charge density. This method requires to control three different limits: continuum limit, limit of vanishing smearing width used in the HLT inverse problem resolution, and limit of vanishing smoothing radius used in the topological charge density correlator computation. Our lattice calculation is based on the standard Wilson discretization for the gauge action, and on three gauge ensembles with up to temporal points to achieve a controlled continuum limit. In all cases we employed an aspect ratio , which allowed us to compute the topological rate up to momenta as large as .

    hep-lathep-phhep-th0 citations
  2. 02

    Analytically Consistent Reconstruction of Finite Data Using Padé Sequences

    Emerson Díaz · Balma Duch🇪🇸 · Pere Masjuan🇪🇸

    Reconstructing the analytic structure of a function from finite datasets is a fundamental problem across theoretical, numerical, and experimental physics. While Padé approximants provide a natural framework, finite-information effects, as well as statistical and systematic uncertainties, may obscure the underlying analytic structure and limit reconstruction reliability. In this work, we reinterpret the appearance of Froissart doublets not merely as numerical artifacts but as \textit{diagnostic objects} carrying information about the analytic consistency of the input data. Accordingly, we develop a general Padé-based algorithm that exploits the dynamics of Froissart doublets along Padé sequences to identify localized inconsistencies and iteratively reconstruct the analytic structure most compatible with the data. The method requires no model for the origin of the inconsistencies and distinguishes genuine analytic features from spurious structures induced by finite-information effects. We validate it using Stieltjes functions, realistic pseudo-experimental datasets with statistical and systematic uncertainties, and general holomorphic functions. The complete algorithm is provided as a supplementary Mathematica notebook in an open GitLab repository.

    ↳ physics.data-anhep-exhep-lathep-ph0 citations
  3. 03

    Particle Production, Equilibration, and Quantum Recurrences from Classical Fields

    Iván Cuntín🇪🇸 · Wenyang Qian🇪🇸 · Bin Wu🇪🇸

    We investigate particle production from classical fields, a phenomenon central to the pre-equilibrium dynamics of relativistic heavy-ion collisions and the reheating epoch of the early Universe. Using lattice theory as a proof of principle, we show that this problem is naturally amenable to quantum computation, providing a first-principles framework for nonequilibrium quantum-field dynamics beyond existing approximations. We perform simulations on small spatial lattices, exhausting our available classical computational resources while maintaining a direct mapping to future quantum-computing implementations. We find that particle production is accompanied by equilibration of observables, including the field expectation value, occupation-number distribution, and pressure. The observed equilibration persists for timescales several times longer than the initial equilibration time before the observables resume oscillatory behavior associated with quantum Poincaré recurrences. Our results establish a route toward first-principles studies of equilibration in nonequilibrium quantum field theory and provide insight into the search for the smallest possible locally equilibrated quark-gluon systems at hadron colliders.

    ↳ hep-phhep-latnucl-thquant-ph0 citations

Affiliations

first authorsco-authorsvia INSPIRE