Bounce universe from string-inspired Gauss-Bonnet gravity; Journal of Cosmology and Astroparticle Physics; Vol. 2015

Bounce universe from string-inspired Gauss-Bonnet gravity; Journal of Cosmology and Astroparticle Physics; Vol. 2015

Xehetasun bibliografikoak
Parent link:Journal of Cosmology and Astroparticle Physics
Vol. 2015.— 2015.— [27 p.]
Erakunde egilea: Национальный исследовательский Томский политехнический университет Физико-технический институт Кафедра высшей математики и математической физики
Beste egile batzuk: Bamba K., Makarenko A. N., Myagky A. N. Alexander Nikolayevich, Odintsov S. D.
Gaia:Title screen
We explore cosmology with a bounce in Gauss-Bonnet gravity where the GaussBonnet invariant couples to a dynamical scalar field. In particular, the potential and and Gauss-Bonnet coupling function of the scalar field are reconstructed so that the cosmological bounce can be realized in the case that the scale factor has hyperbolic and exponential forms. Furthermore, we examine the relation between the bounce in the string (Jordan) and Einstein frames by using the conformal transformation between these conformal frames. It is shown that in general, the property of the bounce point in the string frame changes after the frame is moved to the Einstein frame. Moreover, it is found that at the point in the Einstein frame corresponding to the point of the cosmological bounce in the string frame, the second derivative of the scale factor has an extreme value. In addition, it is demonstrated that at the time of the cosmological bounce in the Einstein frame, there is the Gauss-Bonnet coupling function of the scalar field, although it does not exist in the string frame.
Режим доступа: по договору с организацией-держателем ресурса
Hizkuntza:ingelesa
Argitaratua: 2015
Gaiak:
электронный ресурс
труды учёных ТПУ
космология
гравитация
скалярное поле
Sarrera elektronikoa:http://dx.doi.org/10.1088/1475-7516/2015/04/001
Formatua: Baliabide elektronikoa Liburu kapitulua
KOHA link:https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=647860

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