TY  - JOUR
A1  - Vasak, David
A1  - Kirsch, Johannes
A1  - Struckmeier, Jürgen
T1  - Rigorous derivation of dark energy and inflation as geometry effects in Covariant Canonical Gauge Gravity
T2  - Astronomische Nachrichten = Astronomical notes
N2  - The cosmological implications of the Covariant Canonical Gauge Theory of Gravity (CCGG) are investigated. CCGG is a Palatini theory derived from first principles using the canonical transformation formalism in the covariant Hamiltonian formulation. The Einstein-Hilbert theory is thereby extended by a quadratic Riemann-Cartan term in the Lagrangian. Moreover, the requirement of covariant conservation of the stress-energy tensor leads to necessary presence of torsion. In the Friedman universe that promotes the cosmological constant to a time-dependent function, and gives rise to a geometrical correction with the EOS of dark radiation. The resulting cosmology, compatible with the ΛCDM parameter set, encompasses bounce and bang scenarios with graceful exits into the late dark energy era. Testing those scenarios against low-z observations shows that CCGG is a viable theory.
KW  - cosmological constant
KW  - dark energy
KW  - extended Einstein gravity
KW  - Friedman equation
KW  - gauge theory
KW  - gravitation
KW  - Palatini
KW  - quadratic Lagrangian
KW  - torsion
Y1  - 2021
UR  - http://publikationen.ub.uni-frankfurt.de/frontdoor/index/index/docId/63880
UR  - https://nbn-resolving.org/urn:nbn:de:hebis:30:3-638802
SN  - 1521-3994
N1  - This work has been supported by the Walter Greiner Gesellschaft zur Förderung der physikalischen Grundlagenforschung e.V., and carried out in collaboration with the Goethe University Frankfurt, Ben Gurion University of the Negev Beer Sheva, and with GSI Darmstadt. D. V. and J. K. especially thank the Fueck-Stiftung for support.
VL  - 342
IS  - 1-2
SP  - 81
EP  - 88
PB  - Wiley-VCH Verl.
CY  - Berlin
ER  -