Tachyons in classical de Sitter vacua

Tachyons in classical de Sitter vacua
复制标题

经典德西特真空中的快子

DOI:
--
复制
发表时间:
2016
期刊:
影响因子:
--
通讯作者:
D. Junghans
D. Junghans
中科院分区:
--
文献类型:
--
作者:
D. Junghans

文献摘要

参考文献

被引文献

相似文献

我们在经典二阶超重力近似的水平上重新讨论了II型弦理论中存在德西特真空和慢滚膨胀的可能性。先前对显式结构的尝试受到普遍存在的具有大η参数的速子的困扰,这些速子的起源至今尚未完全了解。在本文中,我们确定并解释了两种已知存在不稳定dS临界点的速子:具有o6平面的大质量IIA型的SU(3)结构紧化和具有O5/ o7平面的IIB型的SU(2)结构紧化。我们明确地表明,在考虑的例子中,速子总是接近sgoldstino方向,但从未完全与sgoldstino方向排列,并认为这种行为可以用Covi等人的no-go定理的广义版本来解释,该定理在sgoldstino和正交模之间的质量矩阵中存在大量混合。这一观测结果也可能为超重力和弦理论中的一般dS真空提供一个有用的稳定性判据。
A bstractWe revisit the possibility of de Sitter vacua and slow-roll inflation in type II string theory at the level of the classical two-derivative supergravity approximation. Previous attempts at explicit constructions were plagued by ubiquitous tachyons with a large η parameter whose origin has not been fully understood so far. In this paper, we determine and explain the tachyons in two setups that are known to admit unstable dS critical points: an SU(3) structure compactification of massive type IIA with O6-planes and an SU(2) structure compactification of type IIB with O5/O7-planes. We explicitly show that the tachyons are always close to, but never fully aligned with the sgoldstino direction in the considered examples and argue that this behavior is explained by a generalized version of a no-go theorem by Covi et al, which holds in the presence of large mixing in the mass matrix between the sgoldstino and the orthogonal moduli. This observation may also provide a useful stability criterion for general dS vacua in supergravity and string theory.
DOI: 10.1007/jhep04(2014)064
发表时间: 2013-09
影响因子: 5.4
作者:
Fabio Apruzzi;M. Fazzi;Dario Rosa;A. Tomasiello
通讯作者: Fabio Apruzzi;M. Fazzi;Dario Rosa;A. Tomasiello
DOI: 10.1007/jhep06(2012)029
发表时间: 2012
影响因子: 5.4
作者:
F. F. Gautason;D. Junghans;M. Zagermann
通讯作者: M. Zagermann
DOI: 10.1007/jhep10(2014)034
发表时间: 2014
影响因子: 5.4
作者:
D. Junghans;D. Schmidt;M. Zagermann
通讯作者: M. Zagermann