TY - JOUR
T1 - Gauss-Bonnet inflation
AU - Kanti, Panagiota
AU - Gannouji, Radouane
AU - Dadhich, Naresh
N1 - Publisher Copyright:
© 2015 American Physical Society.
PY - 2015/8/24
Y1 - 2015/8/24
N2 - We consider an Einstein-scalar-Gauss-Bonnet gravitational theory, and argue that at early times the Ricci scalar can be safely ignored. We then demonstrate that the pure scalar-Gauss-Bonnet theory, with a quadratic coupling function, naturally supports inflationary - de Sitter - solutions. During inflation, the scalar field decays exponentially and its effective potential remains always bounded. The theory also contains solutions where these de Sitter phases possess a natural exit mechanism and are replaced by linearly expanding - Milne - phases.
AB - We consider an Einstein-scalar-Gauss-Bonnet gravitational theory, and argue that at early times the Ricci scalar can be safely ignored. We then demonstrate that the pure scalar-Gauss-Bonnet theory, with a quadratic coupling function, naturally supports inflationary - de Sitter - solutions. During inflation, the scalar field decays exponentially and its effective potential remains always bounded. The theory also contains solutions where these de Sitter phases possess a natural exit mechanism and are replaced by linearly expanding - Milne - phases.
UR - http://www.scopus.com/inward/record.url?scp=84940386999&partnerID=8YFLogxK
U2 - 10.1103/PhysRevD.92.041302
DO - 10.1103/PhysRevD.92.041302
M3 - Article
AN - SCOPUS:84940386999
SN - 1550-7998
VL - 92
JO - Physical Review D - Particles, Fields, Gravitation and Cosmology
JF - Physical Review D - Particles, Fields, Gravitation and Cosmology
IS - 4
M1 - 041302
ER -