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arXiv 1205.6403hep-thgr-qc
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三维和四维的U-对偶性

U-duality in three and four dimensions

Emanuel Malek

摘要:

利用广义几何,我们研究了U-对偶在三维和四维中对十一维超引力玻色子场的作用。我们比较了双场论的U-对偶对称性和T-对偶对称性,并观察了$SL(2)\otimes SL(3)$和SL(5)U-对偶群如何约化为IIA型理论的SO(2,2)和SO(3,3)T-对偶对称群。作为例子,我们对偶M2-膜,黑色和极端。我们发现不带电的黑M2-膜在U-对偶下变成带电的,推广了Harrison变换,而极端M2-膜将变成新的极端M2-膜。如果我们使用离散的U-对偶群$E_d(Z)$,则由此产生的张力和电荷被适当地量子化。

英文摘要:

Using generalised geometry we study the action of U-duality acting in three and four dimensions on the bosonic fields of eleven dimensional supergravity. We compare the U-duality symmetry with the T-duality symmetry of double field theory and see how the $SL(2)\otimes SL(3)$ and SL(5) U-duality groups reduce to the SO(2,2) and SO(3,3) T-duality symmetry groups of the type IIA theory. As examples we dualise M2-branes, both black and extreme. We find that uncharged black M2-branes become charged under U-duality, generalising the Harrison transformation, while extreme M2-branes will become new extreme M2-branes. The resulting tension and charges are quantised appropriately if we use the discrete U-duality group $E_d(Z)$.

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