Response of holographic QCD to electric and magnetic fields

Oren Bergman, Gilad Lifschytz, Matthew Lippert

Research output: Contribution to journalArticlepeer-review


We study the response of the Sakai-Sugimoto holographic model of large N c QCD at nonzero temperature to external electric and magnetic fields. In the electric case we find a first-order insulator-conductor transition in both the confining and deconfining phases of the model. In the deconfining phase the conductor is described by the parallel 8-brane-anti-8-brane embedding with a current of quarks and anti-quarks. We compute the conductivity and show that it agrees precisely with a computation using the Kubo formula. In the confining phase we propose a new kind of 8-brane embedding, corresponding to a baryonic conductor. In the magnetic field case we show that the critical temperature for chiral-symmetry restoration in the deconfined phase increases with the field and approaches a finite value in the limit of an infinite magnetic field. We also illustrate the nonlinear behavior of the electric and magnetic susceptibilities in the different phases.

Original languageEnglish
Article number007
JournalJournal of High Energy Physics
Issue number5
StatePublished - 1 May 2008


  • Gauge-gravity correspondence
  • QCD

ASJC Scopus subject areas

  • Nuclear and High Energy Physics


Dive into the research topics of 'Response of holographic QCD to electric and magnetic fields'. Together they form a unique fingerprint.

Cite this