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openQ*D code: a versatile tool for QCD+QED simulations

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arxiv 1908.11673 v1 pith:CHNE2TG6 submitted 2019-08-30 hep-lat

Isabel Campos , Patrick Fritzsch , Martin Hansen , Marina Krstic Marinkovic , Agostino Patella , Alberto Ramos , Nazario Tantalo This is my paper · ORCID
classification hep-lat
keywords openqboundarycodeconditionsopenqcd-1simulationsallowsbeen
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We present the open-source package openQ*D-1.0, which has been primarily, but not uniquely, designed to perform lattice simulations of QCD+QED and QCD, with and without C* boundary conditions, and O(a) improved Wilson fermions. The use of C* boundary conditions in the spatial direction allows for a local and gauge-invariant formulation of QCD+QED in finite volume, and provides a theoretically clean setup to calculate isospin-breaking and radiative corrections to hadronic observables from first principles. The openQ*D code is based on openQCD-1.6 and NSPT-1.4. In particular it inherits from openQCD-1.6 several core features, e.g. the highly optimized Dirac operator, the locally deflated solver, the frequency splitting for the RHMC, or the 4th order OMF integrator.

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Cited by 3 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Partially connected contributions to baryon masses in QCD+QED

    hep-lat 2025-02 conditional novelty 5.0 of 10

    A lattice QCD+QED proceedings paper derives the one-quark connected contribution to the Omega^- two-point function under C-periodic boundary conditions and proposes a point-plus-stochastic-source strategy to compute it.

  2. $O(a)$-improved QCD+QED Wilson Dirac operator on GPUs

    hep-lat 2025-02 conditional novelty 5.0 of 10

    The authors ported openQxD's QCD+QED Dirac solver to GPUs via QUDA and measured a significant speed-up with good weak scaling on up to 512 GPUs.

  3. Baryon masses with C-periodic boundary conditions

    hep-lat 2026-02 conditional novelty 4.0 of 10

    First numerical estimates of the C-periodic 1-q connected contributions to the Omega-minus two-point function, plus preliminary proton and Omega masses at m_pi ~ 400 MeV.

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