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Flavor superconductivity from gauge/gravity duality

AutorAmmon, Martin; Erdmenger, Johanna; Kaminski, Matthias ; Kerner, Patrick
Palabras claveD-branes
Black Holes
Gauge-gravity correspondence
Fecha de publicaciónoct-2009
EditorInstitute of Physics Publishing
International School for Advanced Studies
CitaciónJournal of High Energy Physics 10(067): (2009)
ResumenWe give a detailed account and extensions of a holographic flavor superconductivity model which we have proposed recently. The model has an explicit field theory realization as strongly coupled = 2 Super Yang-Mills theory with fundamental matter at finite temperature and finite isospin chemical potential. Using gauge/gravity duality, i.e. a probe of two flavor D7-branes in the AdS black hole background, we show that the system undergoes a second order phase transition with critical exponent 1/2. The new ground state may be interpreted as a ρ meson superfluid. It shows signatures known from superconductivity, such as an infinite dc conductivity and a gap in the frequency-dependent conductivity. We present a stringy picture of the condensation mechanism in terms of a recombination of strings. We give a detailed account of the evaluation of the non-Abelian Dirac-Born-Infeld action involved using two different methods. Finally we also consider the case of massive flavors and discuss the holographic Meissner-Ochsenfeld effect in our scenario.
Descripción41 pages, 19 figures.
Versión del editorhttp://dx.doi.org/10.1088/1126-6708/2009/10/067
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