Oh, wait, O8 de Sitter may be unstable!
نویسندگان
چکیده
A bstract We analyze the stability of four-dimensional de Sitter vacua constructed by compactifying massive Type IIA supergravity in presence two O8 sources [1]. When embedded String Theory first source has a clear interpretation as an ? plane, but second one could correspond to either + plane or with 16 D8-branes on top. find that this latter solution tachyonic instability, corresponding D8 branes moving away from plane. comment possible ways distinguishing between these sources.
منابع مشابه
Evolution of Gravitationally Unstable de Sitter Compactifications
We study the time evolution of unstable dSp × S configurations with flux in theories of gravity with a cosmological constant. For certain values of the flux, we identify a stable configuration to which these unstable solutions flow. For other values of the flux the sphere wants to decompactify, regardless of the sign of the initial perturbation.
متن کاملDe Sitter and Schwarzschild-de Sitter According to Schwarzschild and De Sitter
When de Sitter first introduced his celebrated spacetime, he claimed, following Schwarzschild, that its spatial sections have the topology of the real projective space IRP 3 (that is, the topology of the group manifold SO(3)) rather than, as is almost universally assumed today, that of the sphere S. (In modern language, Schwarzschild was disturbed by the non-local correlations enforced by S geo...
متن کاملSwitched systems that are periodically stable may be unstable
We prove the existence of two 2×2 real matrices such that all periodic products of these matrices converge to zero but there exists an infinite product that does not. We outline implications of this result for the stability of switched linear systems, and for the finiteness conjecture. Remark: This is a conference version of a paper submitted for publication. Proofs of the results can be found ...
متن کاملThe clash between de Sitter and anti-de Sitter space
We investigate solutions that are dynamically evolving between asymptotically de Sitter and asymptotically anti-de Sitter regions in the context of Einstein gravity coupled to general matter fields in d dimensions. We demonstrate the existence of a no go theorem whenever the matter content of the theory is ‘reasonable’, i.e., such that the weak energy condition is satisfied. We show that there ...
متن کاملNew Coordinates for de Sitter Space and de Sitter Radiation
We introduce a simple coordinate system covering half of de Sitter space. The new coordinates have several attractive properties: the time direction is a Killing vector, the metric is smooth at the horizon, and constant-time slices are just flat Euclidean space. We demonstrate the usefulness of the coordinates by calculating the rate at which particles tunnel across the horizon. When self-gravi...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Journal of High Energy Physics
سال: 2021
ISSN: ['1127-2236', '1126-6708', '1029-8479']
DOI: https://doi.org/10.1007/jhep03(2021)168