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arXiv 1001.4945hep-th
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来自10 d超引力的Lifshitz背景

Lifshitz backgrounds from 10d supergravity

Johan Blåbäck, Ulf H. Danielsson, Thomas Van Riet

摘要:

我们研究了在IIA和IIA* 超引力中,通过变形现有的(A)dS_4紧化是否能找到四维静态和宇宙学Lifshitz解。使用一个很好的动机紧化Ancillation SU(3)-结构流形与19个待定参数,我们证明,这不是在普通IIA超引力的情况下,从而推广以前的nogo结果在不同的方式。另一方面,对于IIA*,我们构造了显式的宇宙学Lifshitz解。我们还考虑解决方案与非常数标量,并能够找到简单的静态和宇宙学的Lifshitz解决方案在IIB* 超引力和欧几里得Lifshitz解决方案在普通欧几里得IIB超引力,这是类似的非极值变形的D-瞬子。后者的解具有z=-2。

英文摘要:

We investigate whether 4-dimensional static and cosmological Lifshitz solutions can be found from deforming the existing (A)dS_4 compactifications in IIA and IIA* supergravity. Using a well motivated compactification Ansatz on SU(3)-structure manifolds with 19 undetermined parameters we demonstrate that this is not the case in ordinary IIA supergravity, thereby generalising previous nogo results in different ways. On the other hand, for IIA* we construct explicit cosmological Lifshitz solutions. We also consider solutions with non-constant scalars and are able to find simple static and cosmological Lifshitz solutions in IIB* supergravity and a Euclidean Lifshitz solution in ordinary Euclidean IIB supergravity, which is similar to a non-extremal deformation of the D-instanton. The latter solutions have z=-2.

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