Ramond-Ramond Couplings of Noncommutative D-branes
Ramond-Ramond Couplings of Noncommutative D-branes
复制标题
非交换 D 膜的 Ramond-Ramond 耦合
DOI：
10.1016/s0370-2693(01)01027-9
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发表时间：
2001
影响因子：
4.4
通讯作者：
J. Michelson
中科院分区：
文献类型：
--
作者：
Hong Liu;J. Michelson
本文提出了在一个常数NS-NS B-场中，当非对易参数为任意值时，D-膜与Ramond-Ramond（RR）势在α′展开中的主导耦合.该建议的动机是一些字符串振幅计算。零动量耦合在本质上是拓扑的，并且包括涉及非对易陈特征的埃利奥特公式。有限动量耦合是通过将零动量算符沿着开Wilson线涂抹而得到的。不同描述的RR耦合之间的比较导致更好地理解规范场变量之间的场重新定义（Seiberg-Witten映射），并有助于约束α′修正。特别地，我们恢复了Seiberg-Witten地图由一位作者在hep-th/0011125中所描述的。我们还讨论了横向标量场的动力学，并找到一个新的衍生物驱动的介电效应的证据。
We propose the leading couplings, in an α′ expansion, of D-branes to Ramond–Ramond (RR) potentials in a constant NS–NS B-field for an arbitrary choice of noncommutative parameter. The proposal is motivated by some string amplitude computations. The zero momentum couplings are topological in nature and include Elliott's formula involving the noncommutative Chern character. The finite momentum couplings are given by smearing the zero momentum operators along an open Wilson line. Comparisons between the RR couplings in different descriptions lead to a better understanding of the field redefinitions between gauge field variables (the Seiberg–Witten map) and help constrain α′ corrections. In particular we recover the Seiberg–Witten map conjectured by one of the authors in hep-th/0011125. We also discuss the dynamics of the transverse scalar fields and find evidence for a new derivative-driven dielectric effect.