Conformal transformations with multiple scalar fields
Author(s)Kaiser, David I.
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Many interesting models incorporate scalar fields with nonminimal couplings to the spacetime Ricci curvature scalar. As is well known, if only one scalar field is nonminimally coupled, then one may perform a conformal transformation to a new frame in which both the gravitational portion of the Lagrangian and the kinetic term for the (rescaled) field assume canonical form. We examine under what conditions the gravitational and kinetic terms in the Lagrangian may be brought into canonical form when more than one scalar field has nonminimal coupling. A particular class of two-field models admits such a transformation, but models with more than two nonminimally coupled fields, in general, do not.
DepartmentMassachusetts Institute of Technology. Center for Theoretical Physics; Massachusetts Institute of Technology. Program in Science, Technology and Society
Physical Review D
American Physical Society
Kaiser, David I. “Conformal transformations with multiple scalar fields.” Physical Review D 81.8 (2010): 084044. © 2010 The American Physical Society
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