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arXiv 1209.0152math.DGhep-th
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关于仿厄米流形上的双域论

Towards a double field theory on para-Hermitian manifolds

Izu Vaisman

摘要:

在以前的论文中,我们已经证明了几何的双重域论有一个自然的解释平坦的para-Kähler流形。在本文中,我们证明了相同的尺规作图法可以在任何仿厄米流形上进行。该域被解释为相容的(伪)黎曼度量。流形的切丛有一个自然的、度量相容的括号,它扩展了双域论的C括号。在para-Kähler的情况下,这个括号等于流形的两个拉格朗日叶理的柯朗括号之和。然后,我们定义了对应于双域论相似对象的规范联络和域的作用。另一节是专门用于减少在双域论的para-Hermitian流形的Marsden-Weinstein。最后,我们给出了一些著名的仿厄米流形上的场的例子。

英文摘要:

In a previous paper, we have shown that the geometry of double field theory has a natural interpretation on flat para-Kähler manifolds. In this paper, we show that the same geometric constructions can be made on any para-Hermitian manifold. The field is interpreted as a compatible (pseudo-)Riemannian metric. The tangent bundle of the manifold has a natural, metric-compatible bracket that extends the C-bracket of double field theory. In the para-Kähler case this bracket is equal to the sum of the Courant brackets of the two Lagrangian foliations of the manifold. Then, we define a canonical connection and an action of the field that correspond to similar objects of double field theory. Another section is devoted to the Marsden-Weinstein reduction in double field theory on para-Hermitian manifolds. Finally, we give examples of fields on some well-known para-Hermitian manifolds.

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