Hairpin-branes and tachyon-paperclips in holographic backgrounds
Hairpin-branes and tachyon-paperclips in holographic backgrounds
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全息背景中的发夹膜和快子回形针
DOI：
10.1016/j.nuclphysb.2010.08.011
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发表时间：
2010
期刊：
影响因子：
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通讯作者：
V. Niarchos
中科院分区：
文献类型：
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作者：
V. Niarchos
具有U形几何形状的D膜，就像QCD的酒井杉本模型中的D8味道膜一样，经常在全息背景中遇到。我们认为，通常使用的DBI作用不足以作为对这些膜的有效的场论描述，因为它遗漏了低能动力学的一个重要组成部分：光复杂标量模。遵循Erkal，Kutasov和Lumin的思想，我们阐述了一种基于阿贝尔快子-DBI作用的有效描述，它自然地结合了复标量模的非局域物理。我们在开放弦动力学的显式世界表描述存在的背景下展示了它的力量-NS5-膜的背景中的发夹膜。我们的结果与QCD中手征对称性破缺和裸夸克质量以及弯曲背景下开弦快子凝聚的全息描述是相关的。
D-branes with a U-shaped geometry, like the D8 flavor branes in the Sakai–Sugimoto model of QCD, are encountered frequently in holographic backgrounds. We argue that the commonly used DBI action is inadequate as an effective field theory description of these branes, because it misses a crucial component of the low-energy dynamics: a light complex scalar mode. Following an idea of Erkal, Kutasov and Lunin we elaborate on an effective description based on the abelian tachyon-DBI action which incorporates naturally the non-local physics of the complex scalar mode. We demonstrate its power in a context where an explicit worldsheet description of the open string dynamics exists—hairpin-branes in the background of NS5-branes. Our results are relevant for the holographic description of chiral symmetry breaking and bare quark mass in QCD and open string tachyon condensation in curved backgrounds.