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arXiv 0709.2856hep-th
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AdS_5 x Y^{p,q}的半BPS态

Half BPS states in AdS_5 x Y^{p,q}

Edi Gava, Kumar S. Narain, Giuseppe Milanesi, Martin O'Loughlin

摘要:

研究了一类渐近AdS_5 x Y^{p,q}的IIB超引力解.它们有一个R x SO(4)x SU(2)x U(1)等距,并保留了背景几何中8个超荷的一半。它们由一组二阶微分方程描述,我们在以前的论文中已经发现并分析过,在那里我们研究了最大超对称AdS_5 × S^5背景下的1/8 BPS态。这些几何对应于N=1的超共形N-S理论的某些手征原算符,与AdS_5 x Y^{p,q}上的IIB理论对偶。我们还展示了如何恢复AdS_5 x Y^{p,q}背景适当地增加一倍的数量保持超对称。然后,我们求解微分方程摄动在一个大的AdS_5半径的扩展,施加渐近AdS_5 x Y^{p,q}边界条件。我们计算了整体重子荷和介子荷,包括R荷。对于对偶场论算子的质量,即共形维数D的计算,我们采用Wald及其合作者的一般形式,给出了一个有限结果,并验证了N=1超共形代数所要求的关系D=3 R / 2.

英文摘要:

We study a class of solutions of IIB Supergravity which are asymptotically AdS_5 x Y^{p,q}. They have an R x SO(4) x SU(2) x U(1) isometry and preserve half of the 8 supercharges of the background geometry. They are described by a set of second order differential equations that we have found and analysed in a previous paper, where we studied 1/8 BPS states in the maximally supersymmetric AdS_5 x S^5 background. These geometries correspond to certain chiral primary operators of the N=1 superconformal quiver theories, dual to IIB theory on AdS_5 x Y^{p,q}. We also show how to recover the AdS_5 x Y^{p,q} backgrounds by suitably doubling the number of preserved supersymmetries. We then solve the differential equations perturbatively in a large AdS_5 radius expansion, imposing asymptotic AdS_5 x Y^{p,q} boundary conditions. We compute the global baryonic and mesonic charges, including the R-charge. As for the computation of the mass, i.e. the conformal dimension D of the dual field theory operators, which is notoriously subtle in asymptotically AdS backgrounds, we adopt the general formalism due to Wald and collaborators, which gives a finite result, and verify the relation D=3 R / 2, demanded by the N=1 superconformal algebra.

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