Inverse magnetic catalysis in QCD

Falk Bruckmann, Gergely Endrődi, Tamas G. Kovacs

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Abstract

We propose a physical mechanism for inverse magnetic catalysis, the suppression of the chiral condensate by an external magnetic field in QCD around the critical temperature. We show that this effect, seen in lattice simulations, is a result of how the sea quarks react to the magnetic field. We find that the suppression of the condensate happens because the quark determinant can suppress low quark modes by ordering the Polyakov loop. This mechanism is particularly efficient around Tc where the Polyakov loop effective potential is flat and the determinant can have a significant ordering effect. Our picture suggests that for the description of QCD in large magnetic fields it is crucial to properly capture the interaction between the Polyakov loop and the sea quarks, both in low-energy effective models and on the lattice.

Original languageEnglish
Article number181
JournalProceedings of Science
Volume29-July-2013
Publication statusPublished - Jan 1 2013
Event31st International Symposium on Lattice Field Theory, LATTICE 2013 - Mainz, Germany
Duration: Jul 29 2013Aug 3 2013

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ASJC Scopus subject areas

  • General

Cite this

Bruckmann, F., Endrődi, G., & Kovacs, T. G. (2013). Inverse magnetic catalysis in QCD. Proceedings of Science, 29-July-2013, [181].