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arXiv 1109.3097hep-th
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关于IKKT模型和非交换膜的单圈有效action

On the 1-loop effective action for the IKKT model and non-commutative branes

Daniel N. Blaschke, Harold Steinacker

摘要:

研究了4维非对易膜背景下IKKT或IIB模型的单圈有效作用量。迹-U(1)扇区由非对易性支配,并导致-假设没有超对称破缺-更高导数的有效作用量。相比之下,非阿贝尔扇区在低能量下在膜上简化为SU(n)N=4的超杨米尔斯,全局SO(9,1)对称性被背景自发破缺。在库仑分支中,我们恢复了对狄拉克-玻恩-因菲尔德(DBI)作用量的主要贡献,表现出围绕一堆膜的S^5 \times AdS^5体几何。超对称性可能会被紧致的额外维M^4 x K打破,从而导致由于迹U(1)扇区而在M^4上诱导引力作用。在这种背景下,单回路有效作用是UV有限的,并且UV/IR混合是非病理性的。

英文摘要:

We study the one-loop effective action of the IKKT or IIB model on a 4-dimensional non-commutative brane background. The trace-U(1) sector is governed by non-commutativity, and leads - assuming no SUSY breaking - to a higher-derivative effective action. In contrast, the non-Abelian sector at low energies reduces to SU(n) N=4 Super-Yang-Mills on the brane, with a global SO(9,1) symmetry broken spontaneously by the background. In the Coulomb branch, we recover the leading contribution to the Dirac-Born-Infeld (DBI) action, exhibiting a S^5 \times AdS^5 bulk geometry around a stack of branes. SUSY may be broken by compact extra dimensions M^4 x K, leading to an induced gravitational action on M^4 due to the trace-U(1) sector. The one-loop effective action is UV finite on such backgrounds, and the UV/IR mixing is non-pathological.

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