Flavor superconductivity from gauge/gravity duality
Flavor superconductivity from gauge/gravity duality
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DOI：
10.1088/1126-6708/2009/10/067
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发表时间：
2009-03
影响因子：
5.4
通讯作者：
M. Ammon;J. Erdmenger;M. Kaminski;Patrick Kerner
中科院分区：
文献类型：
--
作者：
M. Ammon;J. Erdmenger;M. Kaminski;Patrick Kerner
We give a detailed account and extensions of a holographic flavor supercon- ductivity model which we have proposed recently. The model has an explicit field theory realization as strongly coupled N = 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.
