scholarly journals Lorentz-diffeomorphism quasi-local conserved charges and Virasoro algebra in Chern–Simons-like theories of gravity

2016 ◽  
Vol 909 ◽  
pp. 345-359 ◽  
Author(s):  
M.R. Setare ◽  
H. Adami
Keyword(s):  
Virasoro Algebra ◽  
Conserved Charges ◽  
Theories Of Gravity ◽  
Chern Simons

scholarly journals Quasilocal conserved charges in the presence of a gravitational Chern-Simons term

2013 ◽  
Vol 88 (12) ◽  
Author(s):  
Wontae Kim ◽  
Shailesh Kulkarni ◽  
Sang-Heon Yi
Keyword(s):  
Conserved Charges ◽  
Chern Simons

Conformal anomaly, virasoro algebra and Chern?Simons cohomology

1986 ◽  
Vol 12 (3) ◽  
pp. 181-188
Author(s):  
Han-Ying Guo ◽  
Hai-Cang Ren ◽  
Ke Wu
Keyword(s):  
Virasoro Algebra ◽  
Conformal Anomaly ◽  
Chern Simons

THE LOVELOCK BLACK HOLES

2008 ◽  
Vol 23 (22) ◽  
pp. 1801-1818 ◽  
Author(s):  
CECILIA GARRAFFO ◽  
GASTON GIRIBET
Keyword(s):  
Black Holes ◽  
Natural Extension ◽  
Higher Dimensions ◽  
Theoretical Physics ◽  
De Sitter ◽  
Einstein Theory ◽  
Naked Singularities ◽  
Theories Of Gravity ◽  
Chern Simons ◽  
Hilbert Action

Lovelock theory is a natural extension of Einstein theory of gravity to higher dimensions, and it is of great interest in theoretical physics as it describes a wide class of models. In particular, it describes string theory inspired ultraviolet corrections to Einstein–Hilbert action, while admits the Einstein general relativity and the so-called Chern–Simons theories of gravity as particular cases. Here, we give an introduction to the black hole solutions of Lovelock theory and analyze their most important properties. These solutions can be regarded as generalizations of the Boulware–Deser solution of Einstein–Gauss–Bonnet gravity, which we discuss in detail here. We briefly discuss some recent progress in understanding these and other solutions, like topological black holes that represent black branes of the theory, and vacuum thin-shell wormhole-like geometries that connect two different asymptotically de Sitter spaces. We also make some comments on solutions with time-like naked singularities.

Cosmological and thermodynamics consequences of viscous modified theories of gravity

2019 ◽  
Vol 34 (35) ◽  
pp. 1950287
Author(s):  
Abdul Jawad ◽  
Saba Qummer ◽  
Shamaila Rani ◽  
M. Younas
Keyword(s):  
Cosmic Acceleration ◽  
Accelerated Expansion ◽  
Modified Theories Of Gravity ◽  
Thermal Equilibrium Condition ◽  
Entropy Variation ◽  
Expansion Of The Universe ◽  
Theories Of Gravity ◽  
Chern Simons ◽  
The Universe ◽  
Dgp Braneworld

The illustration of cosmic acceleration is being presented in the framework of DGP braneworld and dynamical Chern–Simons modified gravity in the presence of casual Israel–Stewart formalism. In this way, we discuss the evolution parameter which leads to the accelerated expansion of the universe in the phantom as well as quintessence region for both gravities. The squared speed of sound [Formula: see text] leads to the stable behavior of the current physical system in both gravities in the later epoch. Also, the entropy variation, as well as thermal equilibrium condition, remains valid in both frameworks at the present and later epoch.

scholarly journals THREE-DIMENSIONAL FIELD THEORIES FROM INFINITE-DIMENSIONAL LIE ALGEBRAS

1994 ◽  
Vol 09 (23) ◽  
pp. 4063-4076
Author(s):  
R. E. C. PERRET
Keyword(s):  
Field Theory ◽  
Lie Algebras ◽  
Three Dimensional ◽  
Virasoro Algebra ◽  
Simons Theory ◽  
Topological Field Theory ◽  
Induced Gravity ◽  
Infinite Dimensional ◽  
Topological Field ◽  
Chern Simons

A procedure for constructing topological actions from centrally extended Lie algebras is introduced. For a Kac–Moody algebra, this produces the three-dimensional Chern–Simons theory, while for the Virasoro algebra, the result is a new three-dimensional topological field theory whose physical states satisfy the Virasoro Ward identity. This topological field theory is shown to be a first order formulation of two-dimensional induced gravity in the chiral gauge. The extension to W3 gravity is discussed.

scholarly journals SYMPLECTIC REDUCTION AND SYMMETRY ALGEBRA IN BOUNDARY CHERN–SIMONS THEORY

1999 ◽  
Vol 14 (03) ◽  
pp. 231-237 ◽  
Author(s):  
PHILLIAL OH ◽  
MU-IN PARK
Keyword(s):  
Reduction Method ◽  
Virasoro Algebra ◽  
Symmetry Algebra ◽  
Symplectic Reduction ◽  
Simons Theory ◽  
Moody Algebra ◽  
Chern Simons ◽  
Chern Simons Theory

We derive the Kac–Moody algebra and Virasoro algebra in Chern–Simons theory with boundary by using the symplectic reduction method and the Noether procedures.

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