Gravitational Waves in Viable Modified Gravity Theories
نویسندگان
چکیده
منابع مشابه
Colliding gravitational plane waves in dilaton gravity.
Collision of plane waves in dilaton gravity theories and low energy limit of string theory is considered. The formulation of the problem and some exact solutions are presented PACS: 04.20.Jb , 04.40.Nr , 04.30.Nk , 11.27.+d
متن کاملLight amplification by gravitational waves in scalar–tensor theories of gravity
It is shown that the amplification of a light beam by gravitational waves in scalar–tensor theories of gravity is a first order effect in the wave amplitudes. In general relativity, instead, the effect is only of second order. To appear in Astrophysical Letters and Communications Scalar–tensor theories (ST) of gravity have been considered as alternatives to general relativity (GR) for a long ti...
متن کاملHelicity-Rotation-Gravity Coupling for Gravitational Waves
The consequences of spin-rotation-gravity coupling are worked out for linear gravitational waves. The coupling of helicity of the wave with the rotation of a gravitational-wave antenna is investigated and the resulting modifications in the Doppler effect and aberration are pointed out for incident high-frequency gravitational radiation. Extending these results to the case of a gravitomagnetic f...
متن کاملInflationary Cosmology in Modified Gravity Theories
We review inflationary cosmology in modified gravity such as R gravity with its extensions in order to generalize the Starobinsky inflation model. In particular, we explore inflation realized by three kinds of effects: modification of gravity, the quantum anomaly, and the R term in loop quantum cosmology. It is explicitly demonstrated that in these inflationary models, the spectral index of sca...
متن کاملAccelerating Universe in Modified Theories of Gravity
We study cosmologies in modified theories of gravity considering Lagrangian density f(R) which is a polynomial function of scalar curvature (R) in the Einstein-Hilbert action in vacuum. The field equation obtained from the modified action corresponding to a Robertson-Walker metric is highly non-linear and not simple enough to obtain analytic solution. Consequently we adopt a numerical technique...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Journal of Physics: Conference Series
سال: 2012
ISSN: 1742-6596
DOI: 10.1088/1742-6596/384/1/012030