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gr-qc2016★ 108 cited
Consistent Higher Derivative Gravitational theories with stable de Sitter and Anti-de Sitter Backgrounds
Tirthabir Biswas, Alexey S. Koshelev, Anupam Mazumdar
In this paper we provide the criteria for any generally covariant, parity preserving, and torsion free theory of gravity to possess a stable de Sitter (dS) or anti-de Sitter (AdS)…
hep-th2016
Gravitational theories with stable (anti-)de Sitter backgrounds
Tirthabir Biswas, Alexey S. Koshelev, Anupam Mazumdar
In this article we will construct the most general torsion-free parity-invariant covariant theory of gravity that is free from ghost-like and tachyonic nstabilities around constant…