A Holographic Study on Vector Condensate Induced by a Magnetic Field

Sep 9, 2013
22 pages
Published in:
  • JHEP 12 (2013) 036
  • Published: 2013
e-Print:

Citations per year

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Abstract: (arXiv)
We study a holographic model with vector condensate by coupling the anti-de Sitter gravity to an Abelian gauge field and a charged vector field in (3+1)(3+1) dimensional spacetime. In this model there exists a non-minimal coupling of the vector filed to the gauge field. We find that there is a critical temperature below which the charged vector condenses via a second order phase transition. The DC conductivity becomes infinite and the AC conductivity develops a gap in the condensed phase. We study the effect of a background magnetic field on the system. It is found that the background magnetic field can induce the condensate of the vector field even in the case without chemical potential/charge density. In the case with non-vanishing charge density, the transition temperature raises with the applied magnetic field, and the condensate of the charged vector operator forms a vortex lattice structure in the spatial directions perpendicular to the magnetic field.
  • condensation: vector
  • magnetic field: background
  • field theory: vector
  • charge: density
  • coupling: vector
  • operator: vector
  • gravitation: anti-de Sitter
  • gauge field theory: abelian
  • temperature: transition
  • coupling: nonminimal