期刊
GENERAL RELATIVITY AND GRAVITATION
卷 43, 期 6, 页码 1571-1576出版社
SPRINGER/PLENUM PUBLISHERS
DOI: 10.1007/s10714-010-1141-y
关键词
Gauss-Bonnet gravity with dynamical dilaton field; Equivalence principle
Einstein-Gauss-Bonnet gravity coupled to a dynamical dilaton is examined from the viewpoint of Einstein's equivalence principle. We point out that the usual frame change that applies to the action without curvature correction does not cure the problem of nonminimal couplings by the dynamical nature of a dilaton field. Thus a modification of the Einstein frame is required. It is proposed that the kinetic term of a dilaton should be brought to a canonical form, which completely fixes the additional terms associated with the frame transformation.
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