The European Physical Journal C | |
Inflationary cosmology from quantum conformal gravity | |
Fabio Scardigli1  Petr Jizba2  Hagen Kleinert3  | |
[1] Department of Mathematics, College of Engineering, American University of the Middle East, P.O. Box 220, 15453, Dasman, Kuwait;Dipartimento di Matematica, Politecnico di Milano, Piazza Leonardo da Vinci 32, 20133, Milan, Italy;FNSPE, Czech Technical University in Prague, Břehová 7, 115 19, Praha 1, Czech Republic;ITP, Freie Universität Berlin, Arnimallee 14, 14195, Berlin, Germany;ITP, Freie Universität Berlin, Arnimallee 14, 14195, Berlin, Germany; | |
关键词: Scalar Field; Conformal Symmetry; Vacuum Expectation Value; Break Phase; Einstein Frame; | |
DOI : 10.1140/epjc/s10052-015-3441-6 | |
来源: Springer | |
【 摘 要 】
We analyze the functional integral for quantum conformal gravity and show that, with the help of a Hubbard–Stratonovich transformation, the action can be broken into a local quadratic-curvature theory coupled to a scalar field. A one-loop effective-action calculation reveals that strong fluctuations of the metric field are capable of spontaneously generating a dimensionally transmuted parameter which, in the weak-field sector of the broken phase, induces a Starobinsky-type f(R)-model with a gravi-cosmological constant. A resulting non-trivial relation between Starobinsky’s parameter and the gravi-cosmological constant is highlighted and implications for cosmic inflation are briefly discussed and compared with the recent PLANCK and BICEP2 data.
【 授权许可】
CC BY
【 预 览 】
Files | Size | Format | View |
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RO202112166814961ZK.pdf | 552KB | download |