Critical points of D-dimensional extended gravities

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Deser S., Liu H., Lü H., Pope C., ŞİŞMAN T. Ç., TEKİN B.

Physical Review D - Particles, Fields, Gravitation and Cosmology, cilt.83, sa.6, 2011 (SCI-Expanded, Scopus)

• Yayın Türü: Makale / Tam Makale
• Cilt numarası: 83 Sayı: 6
• Basım Tarihi: 2011
• Doi Numarası: 10.1103/physrevd.83.061502
• Dergi Adı: Physical Review D - Particles, Fields, Gravitation and Cosmology
• Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
• Açık Arşiv Koleksiyonu: AVESİS Açık Erişim Koleksiyonu
• Hacettepe Üniversitesi Adresli: Hayır

Özet

We study the parameter space of D-dimensional cosmological Einstein gravity together with quadratic curvature terms. In D>4 there are in general two distinct (anti)-de Sitter vacua. We show that, for an appropriate choice of the parameters, there exists a critical point for one of the vacua, with only massless tensor, but neither massive tensor nor scalar, gravitons. At criticality, the linearized excitations have formally vanishing energy (as do black hole solutions). A further restriction of the parameters gives a one-parameter cosmological Einstein plus Weyl2 model with a unique vacuum, whose Λ is determined. © 2011 American Physical Society.