scholarly journals Graviton propagator in a general invariant gauge on de Sitter

2012 ◽  
Vol 53 (12) ◽  
pp. 122502 ◽  
Author(s):  
P. J. Mora ◽  
N. C. Tsamis ◽  
R. P. Woodard
Keyword(s):  
De Sitter ◽  
Graviton Propagator ◽  
Invariant Gauge

scholarly journals Graviton propagator in a 2-parameter family of de Sitter breaking gauges

2019 ◽  
Vol 2019 (10) ◽  
Author(s):  
D. Glavan ◽  
S.P. Miao ◽  
T. Prokopec ◽  
R.P. Woodard
Keyword(s):  
Parameter Family ◽  
De Sitter ◽  
Graviton Propagator

scholarly journals An evaluation of the graviton propagator in de sitter space

1987 ◽  
Vol 292 ◽  
pp. 813-852 ◽  
Author(s):  
Bruce Allen ◽  
Michael Turyn
Keyword(s):  
De Sitter Space ◽  
De Sitter ◽  
Graviton Propagator

scholarly journals The graviton propagator in de Donder gauge on de Sitter background

2011 ◽  
Vol 52 (12) ◽  
pp. 122301 ◽  
Author(s):  
S. P. Miao ◽  
N. C. Tsamis ◽  
R. P. Woodard
Keyword(s):  
De Sitter ◽  
Graviton Propagator ◽  
Sitter Background

scholarly journals The covariant graviton propagator in de Sitter spacetime

2001 ◽  
Vol 18 (20) ◽  
pp. 4317-4327 ◽  
Author(s):  
Atsushi Higuchi ◽  
Spyros S Kouris
Keyword(s):  
De Sitter Spacetime ◽  
De Sitter ◽  
Sitter Spacetime ◽  
Graviton Propagator

scholarly journals Graviton propagator in de Sitter space

1986 ◽  
Vol 34 (12) ◽  
pp. 3670-3675 ◽  
Author(s):  
B. Allen
Keyword(s):  
De Sitter Space ◽  
De Sitter ◽  
Graviton Propagator

scholarly journals The coincidence limit of the graviton propagator in de Donder gauge on de Sitter background

2012 ◽  
Vol 53 (2) ◽  
pp. 022304 ◽  
Author(s):  
E. O. Kahya ◽  
S. P. Miao ◽  
R. P. Woodard
Keyword(s):  
De Sitter ◽  
Graviton Propagator ◽  
Sitter Background

Cosmological spacetimes

2018 ◽  
Author(s):  
Nathalie Deruelle ◽  
Jean-Philippe Uzan
Keyword(s):  
Cosmological Model ◽  
Large Scale ◽  
Cosmic Time ◽  
De Sitter ◽  
Matter Distribution ◽  
Observable Universe ◽  
Cosmological Principle ◽  
Riemannian Spacetime ◽  
The Universe ◽  
Copernican Principle

This chapter provides a few examples of representations of the universe on a large scale—a first step in constructing a cosmological model. It first discusses the Copernican principle, which is an approximation/hypothesis about the matter distribution in the observable universe. The chapter then turns to the cosmological principle—a hypothesis about the geometry of the Riemannian spacetime representing the universe, which is assumed to be foliated by 3-spaces labeled by a cosmic time t which are homogeneous and isotropic, that is, ‘maximally symmetric’. After a discussion on maximally symmetric space, this chapter considers spacetimes with homogenous and isotropic sections. Finally, this chapter discusses Milne and de Sitter spacetimes.

scholarly journals Systematics of type IIA moduli stabilisation

2020 ◽  
Vol 2020 (11) ◽  
Author(s):  
Fernando Marchesano ◽  
David Prieto ◽  
Joan Quirant ◽  
Pramod Shukla
Keyword(s):  
Scalar Potential ◽  
Systematic Search ◽  
Stability Criteria ◽  
De Sitter ◽  
Large Subset

Abstract We analyse the flux-induced scalar potential for type IIA orientifolds in the presence of p-form, geometric and non-geometric fluxes. Just like in the Calabi-Yau case, the potential presents a bilinear structure, with a factorised dependence on axions and saxions. This feature allows one to perform a systematic search for vacua, which we implement for the case of geometric backgrounds. Guided by stability criteria, we consider configurations with a particular on-shell F-term pattern, and show that no de Sitter extrema are allowed for them. We classify branches of supersymmetric and non-supersymmetric vacua, and argue that the latter are perturbatively stable for a large subset of them. Our solutions reproduce and generalise previous results in the literature, obtained either from the 4d or 10d viewpoint.

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