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

Topology in electromagnetic fields and the axion-photon coupling

Aug 12, 2022, 2:50 PM
CP1-HSZ/0.011 (CP1-HSZ) - HS1 (CP1-HSZ)

CP1-HSZ/0.011 (CP1-HSZ) - HS1


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Oral Presentation QCD at Non-zero Temperature Non-zero Temperature


José Javier Hernández Hernández (Bielefeld University)


The introduction of parallel electric and magnetic fields in the QCD vacuum enhances the weight of topological sectors with a non-zero topological charge. For weak fields, there is a linear response for the topological charge. We study this linear response which can be interpreted as the axion-photon coupling. In this work we use lattice simulations with improved staggered quarks including background electric and magnetic fields.

Primary authors

Bastian Brandt (University of Bielefeld) Francesca Cuteri (Goethe University) Gergely Endrődi (University of Bielefeld) Gergely Markò (University of Bielefeld) José Javier Hernández Hernández (Bielefeld University)

Presentation materials