| KLUSOŇ, Josef, Masud CHAICHIAN, Markku OKSANEN a Anca TUREANU. Higher derivative gravity with spontaneous symmetry breaking: Hamiltonian analysis of new covariant renormalizable gravity. Physical review D. American Physical Society, 2013, roč. 87, č. 6, s. nestrankovano, 24 s. ISSN 1550-7998. Dostupné z: https://dx.doi.org/10.1103/PhysRevD.87.064032. |
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@article{1173794,
author = {Klusoň, Josef and Chaichian, Masud and Oksanen, Markku and Tureanu, Anca},
article_number = {6},
doi = {http://dx.doi.org/10.1103/PhysRevD.87.064032},
keywords = {Hamiltonian formalism; higher derivative gravity},
language = {eng},
issn = {1550-7998},
journal = {Physical review D},
title = {Higher derivative gravity with spontaneous symmetry breaking: Hamiltonian analysis of new covariant renormalizable gravity},
volume = {87},
year = {2013}
}
TY - JOUR
ID - 1173794
AU - Klusoň, Josef - Chaichian, Masud - Oksanen, Markku - Tureanu, Anca
PY - 2013
TI - Higher derivative gravity with spontaneous symmetry breaking: Hamiltonian analysis of new covariant renormalizable gravity
JF - Physical review D
VL - 87
IS - 6
SP - nestrankovano
EP - nestrankovano
PB - American Physical Society
SN - 15507998
KW - Hamiltonian formalism
KW - higher derivative gravity
N2 - In order to explore some general features of modified theories of gravity which involve higher derivatives and spontaneous Lorentz and/or diffeomorphism symmetry breaking, we study the recently proposed new version of covariant renormalizable gravity (CRG). CRG attains power-counting renormalizability via higher derivatives and introduction of a constrained scalar field and spontaneous symmetry breaking. We obtain an Arnowitt-Deser-Misner representation of the CRG action in four-dimensional spacetime with respect to a foliation of spacetime adapted to the constrained scalar field. The resulting action is analyzed by using Hamiltonian formalism. We discover that CRG contains two extra degrees of freedom. One of them carries negative energy (a ghost) and it will destabilize the theory due to its interactions. This result is in contrast with the original paper [Phys. Lett. B701, 117 (2011)], where it was concluded that the theory is free of ghosts and renormalizable when we analyze fluctuations on the flat background.
ER -
KLUSOŇ, Josef, Masud CHAICHIAN, Markku OKSANEN a Anca TUREANU. Higher derivative gravity with spontaneous symmetry breaking: Hamiltonian analysis of new covariant renormalizable gravity. \textit{Physical review D}. American Physical Society, 2013, roč.~87, č.~6, s.~nestrankovano, 24 s. ISSN~1550-7998. Dostupné z: https://dx.doi.org/10.1103/PhysRevD.87.064032.
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