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arXiv 0908.0011hep-th
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弦论和M理论中的量子临界超导体

Quantum critical superconductors in string theory and M-theory

Steven S. Gubser, Silviu S. Pufu, Fabio D. Rocha

摘要:

我们构造了五维和四维超引力理论的零温度解,这些零温度解内插在两个反德西特空间之间,其中一个保持阿贝尔规范对称性,而另一个破坏阿贝尔规范对称性,这些畴壁解可以提升到IIB型弦论和11维超引力的解.它们描述了强耦合双规范理论的超流或超导态中的量子临界行为和涌现的相对论共形对称性。我们包括计算频率依赖的电导率,表现出幂律缩放在红外线,与指数确定无关的扰动的破坏性的反德西特背景。

英文摘要:

We construct zero-temperature solutions of supergravity theories in five and four dimensions which interpolate between two copies of anti-de Sitter space, one of which preserves an abelian gauge symmetry while the other breaks it. These domain wall solutions can be lifted to solutions of type IIB string theory and eleven-dimensional supergravity. They describe quantum critical behavior and emergent relativistic conformal symmetry in a superfluid or superconducting state of a strongly coupled dual gauge theory. We include computations of frequency-dependent conductivities which exhibit power law scaling in the infrared, with exponents determined by irrelevant perturbations to the symmetry-breaking anti-de Sitter background.

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