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Superconductivity from gauge/gravity duality with flavor

AutorAmmon, Martin; Erdmenger, Johanna; Kaminski, Matthias ; Kerner, Patrick
Palabras claveGauge/gravity correspondence
Black holes
Fecha de publicación13-sep-2009
CitaciónPhysics Letters B 680(5): 516-520 (2009)
ResumenWe consider thermal strongly-coupled View the MathML source SYM theory with fundamental matter at finite isospin chemical potential. Using gauge/gravity duality, i.e. a probe of two flavor D7-branes embedded in the AdS black hole background, we find a critical temperature at which the system undergoes a second order phase transition. The critical exponent of this transition is one half and coincides with the result from mean field theory. In the thermodynamically favored phase, a flavor current acquires a vev and breaks an Abelian symmetry spontaneously. This new phase shows signatures known from superconductivity, such as an infinite dc conductivity and a gap in the frequency-dependent conductivity. The gravity setup allows for an explicit identification of the degrees of freedom in the dual field theory, as well as for a dual string picture of the condensation process.
Descripción5 pages, 5 figures.
Versión del editorhttp://dx.doi.org/10.1016/j.physletb.2009.09.029
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