Cosmological perturbation in a gravity with quadratic order curvature couplings

Details Cosmological perturbation in a gravity with quadratic order curvature couplings Cosmological perturbation in a gravity with quadratic order curvature couplings

Dec 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998tx19.confe.485n&link_type=abstract

Abstracts of the 19th Texas Symposium on Relativistic Astrophysics and Cosmology, held in Paris, France, Dec. 14-18, 1998. Eds.:

Astronomy and Astrophysics

Astrophysics

Scientific paper

We analyze the evolution of the cosmological gravitational wave and the vorticity in a gravity with quadratic order gravitational coupling terms. The gravitational wave is described by a fourth order differential equation both in time and space while the gravity with a general f(R) term leads to the second order differential equation. The vorticity evolution appears to be independent of the general nature of the gravity theory, and is simply interpreted as a conservation of the angular momentum.

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