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arXiv 1708.04079hep-thmath-phmath.DGmath.MP
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弦有效作用量的Poisson-Lie T-对偶性:解伸缩子之谜的新途径

Poisson-Lie T-duality of String Effective Actions: A New Approach to the Dilaton Puzzle

Branislav Jurco, Jan Vysoky

摘要:

对于一类特殊的背景,相互对偶的泊松-李群中的弦西格玛模型的运动方程是等价的。这种现象被称为Poisson-Lie T-对偶。在相应的弦有效作用量水平上,由于介子场的存在,情况变得更加复杂。利用Levi-Civita联络在Courant代数胚上给出了一种新的解决方法。在引入必要的几何工具后,导出了Poisson-Lie T-对偶重子场的计算公式。这提供了弦有效作用量的泊松-李T-对偶性的一个版本。

英文摘要:

For a particular class of backgrounds, equations of motion for string sigma models targeted in mutually dual Poisson-Lie groups are equivalent. This phenomenon is called the Poisson-Lie T-duality. On the level of the corresponding string effective actions, the situation becomes more complicated due to the presence of the dilaton field. A novel approach to this problem using Levi-Civita connections on Courant algebroids is presented. After the introduction of necessary geometrical tools, formulas for the Poisson-Lie T-dual dilaton fields are derived. This provides a version of Poisson-Lie T-duality for string effective actions.

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