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arXiv 1503.07186hep-th
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关于AdS3上弦论中时空流代数和关联函数的中心荷

On the Central Charge of Spacetime Current Algebras and Correlators in String Theory on AdS3

Jihun Kim, Massimo Porrati

摘要:

在$α'$中,时空Virasoro和在AdS 3中传播的弦的仿射李代数是已知的所有订单。这种代数的中心扩张是一个弦顶点,其期望值可以依赖于背景中存在的长弦的数量,但应该是状态无关的。另一方面,在hep-th/0106004中,发现了一个依赖于状态的期望值。该理论的另一个令人困惑的特点是,在某些关联函数中缺乏簇分解性质。本文指出,这两个问题都可以通过定义时空边界共形场论的自由能为文献中提出的公式的勒让德变换来解决。这对应于从正则系综到微正则系综的转变,在正则系综中,产生背景的基本弦的数量可以波动,而在微正则系综中,它是固定的。

英文摘要:

Spacetime Virasoro and affine Lie algebras for strings propagating in AdS3 are known to all orders in $α'$. The central extension of such algebras is a string vertex, whose expectation value can depend on the number of long strings present in the background but should be otherwise state-independent. In hep-th/0106004, on the other hand, a state-dependent expectation value was found. Another puzzling feature of the theory is lack of cluster decomposition property in certain connected correlators. This note shows that both problems can be removed by defining the free energy of the spacetime boundary conformal field theory as the Legendre transform of the formula proposed in the literature. This corresponds to pass from a canonical ensemble, where the number of fundamental strings that create the background can fluctuate, to a microcanonical one, where it is fixed.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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