Conformal and kinetic couplings as two Jordan frames of the same theory

Gal’tsov, D.V.

Статья опубликована в высокорейтинговом журнале

Информация о цитировании статьи получена из Web of Science, Scopus
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 2 сентября 2020 г.

Автор: Gal’tsov D.V.
Журнал: European Physical Journal C
Том: 80
Номер: 5
Год издания: 2020
Издательство: Springer Verlag
Местоположение издательства: Germany
Первая страница: 443-1
Последняя страница: 443-13
Номер статьи: 443
DOI: 10.1140/epjc/s10052-020-8017-4
Аннотация: Non-minimal scalar-tensor (ST) theories may admit an Einstein frame representation, where grav-ity is described by the Einstein-Hilbert action plus the scalar sector. Some STs become just minimalEinstein-scalar (MES) theories, notable examples are Brans-Dicke and R2. ST theories with deriva-tive coupling can also be reduced to an Einstein frame by disformal transformations, but, as a rule,their scalar sector will contain higher derivative terms. Here we draw attention to a new Palatini ki-netically coupled theory which can be reduced to pure MES by an invertible disformal transformation.This theory can then be converted into the Jordan frame of another ST, R2, which also admits aninvertible transformation to MES. Two theories, each of which is dual to MES, will be sequentiallydual to each other and can be considered as two dierent Jordan frames of the same theory. Bothchosen theories violate null energy condition. Transforming the same singular MES solutions, we ndthe desingularization signs in both Jordan frames, but these are more pronouned in the framework ofkinetic theory, leading, in the cosmological case, to Genesis-type behavior.
Добавил в систему: Гальцов Дмитрий Владимирович

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