Aug 8 – 13, 2022
Hörsaalzentrum Poppelsdorf
Europe/Berlin timezone

Efficiently unquenching electromagnetism in QCD+QED

Aug 11, 2022, 11:30 AM
CP1-HSZ/1.004 (CP1-HSZ) - HS7 (CP1-HSZ)

CP1-HSZ/1.004 (CP1-HSZ) - HS7


Show room on map
Oral Presentation Algorithms (including Machine Learning, Quantum Computing, Tensor Networks) Algorithms


Tim Harris (University of Edinburgh)


In this talk I will outline a strategy to include the effects of the electromagnetic interactions of the sea quarks in QCD+QED. When computing leading order corrections in the electromagnetic coupling, the sea-quark charges result in quark-line disconnected diagrams which are not easily computed using stochastic estimators. An analysis of their variance can help construct better estimators for the relevant traces of quark propagators. I will present preliminary numerical results for the corresponding contributions to the hadronic spectrum using ensembles of domain-wall fermions from the RBC/UKQCD collaboration.

Primary author

Tim Harris (University of Edinburgh)

Presentation materials