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Tunnelling with a negative cosmological constant
 Nucl Phys B472
, 1996
"... The point of this paper is see what light new results in hyperbolic geometry may throw on gravitational entropy and whether gravitational entropy is relevant for the quantum origin of the univeres. We introduce some new gravitational instantons which mediate the birth from nothing of closed universe ..."
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, that universes with domains of negative cosmological constant separated by supergravity domain walls cannot be born from nothing. Finally we point out that our wormholes provide examples of the type of Perpetual Motion machines envisaged by Frolov and Novikov. 1
An Unexpected Electrovac Solution with the Negative Cosmological Constant
, 1998
"... Abstract. An exact solution of the currentfree Einstein–Maxwell equations with the cosmological constant is presented. The solution is of Petrov type D, includes the negative cosmological constant, and could be a “background addition” to the presentday models of the universe. It has a surprising p ..."
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Abstract. An exact solution of the currentfree Einstein–Maxwell equations with the cosmological constant is presented. The solution is of Petrov type D, includes the negative cosmological constant, and could be a “background addition” to the presentday models of the universe. It has a surprising
An Unexpected Electrovac Solution with the Negative Cosmological Constant
, 2000
"... Abstract. An exact solution of the currentfree Einstein–Maxwell equations with the cosmological constant is presented. The solution is of Petrov type D, includes the negative cosmological constant, and could be a “background addition” to the presentday models of the universe. It has a surprising p ..."
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Abstract. An exact solution of the currentfree Einstein–Maxwell equations with the cosmological constant is presented. The solution is of Petrov type D, includes the negative cosmological constant, and could be a “background addition” to the presentday models of the universe. It has a surprising
The asymptotic dynamics of threedimensional Einstein gravity with a negative cosmological constant
, 1995
"... Liouville theory is shown to describe the asymptotic dynamics of threedimensional Einstein gravity with a negative cosmological constant. This is because (i) ChernSimons theory with a gauge group SL(2,R) × SL(2,R) on a spacetime with a cylindrical boundary is equivalent to the nonchiral SL(2,R) ..."
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Liouville theory is shown to describe the asymptotic dynamics of threedimensional Einstein gravity with a negative cosmological constant. This is because (i) ChernSimons theory with a gauge group SL(2,R) × SL(2,R) on a spacetime with a cylindrical boundary is equivalent to the nonchiral SL(2,R
Perfect fluid quantum Universe in the presence of negative cosmological constant
, 2008
"... We present perfect fluid FriedmannRobertsonWalker quantum cosmological models in the presence of negative cosmological constant. In this work the Schutz’s variational formalism is applied for radiation, dust, cosmic string, and domain wall dominated Universes with positive, negative, and zero cons ..."
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We present perfect fluid FriedmannRobertsonWalker quantum cosmological models in the presence of negative cosmological constant. In this work the Schutz’s variational formalism is applied for radiation, dust, cosmic string, and domain wall dominated Universes with positive, negative, and zero
Nucleation of Universe in (2+1)Dimensional Gravity with Negative Cosmological Constant
"... We investigate the nucleation of universe in a (2+1)dimensional gravity model with negative cosmological constant. There are a variety of universes born from nothing by quantum tunneling. Utilizing the powerful technique in hyperbolic geometry, we explicitly construct 3manifolds which describe the ..."
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We investigate the nucleation of universe in a (2+1)dimensional gravity model with negative cosmological constant. There are a variety of universes born from nothing by quantum tunneling. Utilizing the powerful technique in hyperbolic geometry, we explicitly construct 3manifolds which describe
ON EXISTENCE OF NONSINGULAR, VACUUM, STATIONARY SPACETIMES WITH A NEGATIVE Cosmological Constant
, 2005
"... We construct infinite dimensional families of nonsingular stationary space times, solutions of the vacuum Einstein equations with a negative cosmological constant. ..."
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We construct infinite dimensional families of nonsingular stationary space times, solutions of the vacuum Einstein equations with a negative cosmological constant.
New axially symmetric YangMillsHiggs solutions with negative cosmological constant
, 2004
"... We construct numerically new axially symmetric solutions of SU(2) YangMillsHiggs theory in (3 + 1) antide Sitter spacetime. Two types of finite energy, regular configurations are considered: multimonopole solutions with magnetic charge n> 1 and monopoleantimonopole pairs with zero net magneti ..."
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Cited by 3 (0 self)
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We construct numerically new axially symmetric solutions of SU(2) YangMillsHiggs theory in (3 + 1) antide Sitter spacetime. Two types of finite energy, regular configurations are considered: multimonopole solutions with magnetic charge n> 1 and monopoleantimonopole pairs with zero net magnetic charge. A somewhat detailed analysis of the boundary conditions for axially symmetric solutions is presented. The properties of these solutions are investigated, with a view to compare with those on a flat spacetime background. The basic properties of the gravitating generalizations of these configurations are also discussed. 1
Thermodynamics of EinsteinBornInfeld black holes with negative cosmological constant
, 802
"... We study the thermodynamics associated to topological black hole solutions of AdS gravity coupled to nonlinear electrodynamics (BornInfeld) in any dimension, using a backgroundindependent regularization prescription for the Euclidean action given by boundary terms which explicitly depend on the ex ..."
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We study the thermodynamics associated to topological black hole solutions of AdS gravity coupled to nonlinear electrodynamics (BornInfeld) in any dimension, using a backgroundindependent regularization prescription for the Euclidean action given by boundary terms which explicitly depend on the extrinsic curvature (Kounterterms series). A finite action principle leads to the correct definition of thermodynamic variables as Noether charges, which satisfy a Smarrlike relation. In particular, for the odddimensional case, a consistent thermodynamic description is achieved if the internal energy of the system includes the vacuum energy for AdS spacetime. 1
Static axially symmetric solutions of EinsteinYangMills equations with a negative cosmological constant: The regular case
"... Numerical solutions of the EinsteinYangMills equations with a negative cosmological constant are constructed. These axially symmetric solutions approach asymptotically the antide Sitter spacetime and are regular everywhere. They are characterized by the winding number n> 1, the mass and the no ..."
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Numerical solutions of the EinsteinYangMills equations with a negative cosmological constant are constructed. These axially symmetric solutions approach asymptotically the antide Sitter spacetime and are regular everywhere. They are characterized by the winding number n> 1, the mass
Results 1  10
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