期刊
CLASSICAL AND QUANTUM GRAVITY
卷 33, 期 19, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.1088/0264-9381/33/19/195008
关键词
scalar-tensor theory; conformal frames; slow-roll inflation; invariants
类别
资金
- Estonian Research Council [IUT02-27, PUT790]
- European Regional Development Fund through the Centre of Excellence [2014-2020.4.01.15-0004, 3.2.0101.11-0029]
A general scalar-tensor theory can be formulated in different parametrizations that are related by a conformal rescaling of the metric and a scalar field redefinition. We compare formulations of slow-roll regimes in the Einstein and Jordan frames using quantities that are invariant under the conformal rescaling of the metric and transform as scalar functions under the reparametrization of the scalar field. By comparing spectral indices, calculated up to second order, we find that the frames are equivalent up to this order, due to the underlying assumptions.
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