scholarly journals Surface term, corner term, and action growth in F(Rabcd) gravity theory

2019 ◽  
Vol 99 (8) ◽  
Author(s):  
Jie Jiang ◽  
Hongbao Zhang
Keyword(s):  
Gravity Theory ◽  
Surface Term

A Gravity Theory on Noncommutative Spaces

2007 ◽  
Author(s):  
Frank Meyer ◽  
P. Aschieri ◽  
C. Blohmann ◽  
M. Dimitrijevic ◽  
P. Schupp ◽  
...  
Keyword(s):  
Gravity Theory ◽  
Noncommutative Spaces

scholarly journals Gravitational waves in metric-affine gravity theory

2021 ◽  
Vol 103 (2) ◽  
Author(s):  
Alejandro Jiménez-Cano ◽  
Yuri N. Obukhov
Keyword(s):  
Gravitational Waves ◽  
Gravity Theory ◽  
Affine Gravity

Cosmological inflation in f(X) gravity theory

2019 ◽  
Vol 26 ◽  
pp. 100401 ◽  
Author(s):  
Hafiza Rizwana Kausar ◽  
Rabia Saleem ◽  
Amara Ilyas
Keyword(s):  
Gravity Theory ◽  
Cosmological Inflation

Three classical tests of Hořava-Lifshitz gravity theory

2011 ◽  
Vol 337 (2) ◽  
pp. 779-784 ◽  
Author(s):  
Shi-Wei Zhou ◽  
Wen-Biao Liu
Keyword(s):  
Gravity Theory

CLASSICAL INSTABILITY OF THE EINSTEIN-GAUSS-BONNET GRAVITY THEORY WITH COMPACTIFIED HIGHER DIMENSIONS

1991 ◽  
Vol 06 (25) ◽  
pp. 4517-4555 ◽  
Author(s):  
LESZEK M. SOKOŁOWSKI ◽  
ZDZISŁAW A. GOLDA ◽  
MARCO LITTERIO ◽  
LUCA AMENDOLA
Keyword(s):  
Scalar Fields ◽  
Gravity Theory ◽  
Effective Theory ◽  
Internal Space ◽  
Bonnet Gravity ◽  
Four Dimensions ◽  
Effective Gravity ◽  
Tensor Theory ◽  
Exciting System ◽  
Bonnet Term

The energy spectrum and stability of the effective theory resulting from the Einstein-Gauss-Bonnet gravity theory with compactified internal space are investigated. The internal space can evolve in its volume and/or shape, giving rise to a system of scalar fields in the external space-time. The resulting scalar-tensor theory of gravity has physically unacceptable properties. First of all, the scalar fields’ energy is indefinite and unbounded from below, and thereby the gravitational and scalar fields form a self-exciting system. In contradistinction to the case of multidimensional Einstein gravity, this inherent instability of the effective theory cannot be removed by field redefinitions in the process of dimensional reduction (e.g. by a conformal rescaling of the metric in four dimensions, as is done in the former case). To get a viable effective gravity theory one should discard either the geometric scalar fields or the Gauss-Bonnet term from the Lagrangian of the multidimensional theory. It is argued that it is the Gauss-Bonnet term that should be discarded.

scholarly journals Los principios de la relatividad: una introducci´on pedag´ogica

2018 ◽  
Vol 64 (1) ◽  
pp. 87
Author(s):  
Y. Bonder ◽  
E. Okon
Keyword(s):  
Quantum Gravity ◽  
Gravity Theory ◽  
Theory Of Relativity

The principles underlying the theory of relativity, special and general, are presented. An easy to follow and pedagogical language is used and, based on physical examples, the motivation and some consequences of such principles are discussed. In addition, some roles of these principles when looking for a quantum gravity theory are mentioned

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