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:
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发表时间:
2016
期刊:
影响因子:
--
通讯作者:
D. Junghans
中科院分区:
文献类型:
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作者:
D. Junghans
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.
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
影响因子:
5.4
作者:
F. F. Gautason;D. Junghans;M. Zagermann
通讯作者:
M. Zagermann
影响因子:
5.4
作者:
D. Junghans;D. Schmidt;M. Zagermann
通讯作者:
M. Zagermann