Covariant action for a string in doubled yet gauged spacetime
Covariant action for a string in doubled yet gauged spacetime
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DOI：
10.1016/j.nuclphysb.2014.01.003
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发表时间：
2013-07
期刊：
影响因子：
--
通讯作者：
Kanghoon Lee;Jeong-Hyuck Park
中科院分区：
文献类型：
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作者：
Kanghoon Lee;Jeong-Hyuck Park
二重场论中的截面条件已被证明意味着在二重坐标空间中，一个物理点应该与一个规范轨道一一对应。在这里，我们证明匡威也是正确的，并继续探索时空被加倍但测量的想法。通过引入适当的规范连接，构造了一个具有任意广义度规的弦作用量，它关于坐标规范对称、广义超同态、世界单超同态、世界单Weyl对称和O（D，D）T-对偶是完全协变的.一个拓扑长期以前提出的文献中自然产生的自对偶条件如下的运动方程。此外，动作可以耦合到T-对偶背景，其中黎曼度量变得处处奇异。
The section condition in double field theory has been shown to imply that a physical point should be one-to-one identified with a gauge orbit in the doubled coordinate space. Here we show the converse is also true, and continue to explore the idea of spacetime being doubled yet gauged. Introducing an appropriate gauge connection, we construct a string action, with an arbitrary generalized metric, which is completely covariant with respect to the coordinate gauge symmetry, generalized diffeomorphisms, world-sheet diffeomorphisms, world-sheet Weyl symmetry and O (D, D) T-duality. A topological term previously proposed in the literature naturally arises and a self-duality condition follows from the equations of motion. Further, the action may couple to a T-dual background where the Riemannian metric becomes everywhere singular.