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13 papers · 2 filters
Vanishing Cosmological Constant by Gravitino-Dressed Compactification of 11D Supergravity
Fotis Farakos, Alex Kehagias, Emmanuel N. Saridakis
We consider compactifications induced by the gravitino field of eleven dimensional supergravity. Such compactifications are not trivial in the sense that the gravitino profiles are…
"Teleparallel" Dark Energy
Chao-Qiang Geng, Chung-Chi Lee, Emmanuel N. Saridakis +1
Using the "teleparallel" equivalent of General Relativity as the gravitational sector, which is based on torsion instead of curvature, we add a canonical scalar field, allowing for…
General covariant Horava-Lifshitz gravity without projectability condition and its applications to cosmology
Tao Zhu, Fu-Wen Shu, Qiang Wu +1
We consider an extended theory of Horava-Lifshitz gravity with the detailed balance condition softly breaking, but without the projectability condition. With the former, the number…
Static electromagnetic fields and charged black holes in general covariant theory of Horava-Lifshitz gravity
Ahmad Borzou, Kai Lin, Anzhong Wang
In this paper, we study electromeganetic static spacetimes in the nonrelativisitc general covariant theory of the Horava-Lifshitz (HL) gravity, proposed recently by Horava and Melb…
General relativity limit of Horava-Lifshitz gravity with a scalar field in gradient expansion
A. Emir Gumrukcuoglu, Shinji Mukohyama, Anzhong Wang
We present a fully nonlinear study of long wavelength cosmological perturbations within the framework of the projectable Horava-Lifshitz gravity, coupled to a single scalar field.…
Entropic Force Scenarios and Eternal Inflation
Taotao Qiu, Emmanuel N. Saridakis
We examine various entropic inflation scenarios, under the light of eternality. After describing the inflation realization and the normal condition for inflation to last at the bac…
Pistons modeled by potentials
Guglielmo Fucci, Klaus Kirsten, Pedro Morales
In this article we consider a piston modelled by a potential in the presence of extra dimensions. We analyze the functional determinant and the Casimir effect for this configuratio…
On strong coupling in nonrelativistic general covariant theory of gravity
Kai Lin, Anzhong Wang, Qiang Wu +1
We study the strong coupling problem in the Horava-Melby-Thompson setup of the Horava-Lifshitz gravity with an arbitrary coupling constant , generalized recently by da Silva, wh…
Bose-Einstein Condensation on Product Manifolds
Guglielmo Fucci, Klaus Kirsten
We investigate the phenomenon of Bose-Einstein condensation on manifolds constructed as a product of a three-dimensional Euclidian space and a general smooth, compact -dimension…
Black holes and global structures of spherical spacetimes in Horava-Lifshitz theory
Jared Greenwald, Jonatan Lenells, J. X. Lu +2
We systematically study black holes in the Horava-Lifshitz (HL) theory by following the kinematic approach, in which a horizon is defined as the surface at which massless test part…
Detailed balance condition and ultraviolet stability of scalar field in Horava-Lifshitz gravity
Ahmad Borzou, Kai Lin, Anzhong Wang
Detailed balance and projectability conditions are two main assumptions when Horava recently formulated his theory of quantum gravity - the Horava-Lifshitz (HL) theory. While the l…
Conical Casimir Pistons with Hybrid Boundary Conditions
Guglielmo Fucci, Klaus Kirsten
In this paper we compute the Casimir energy and force for massless scalar fields endowed with hybrid boundary conditions, in the setting of the bounded generalized cone. By using s…
The Casimir Effect for Conical Pistons
Guglielmo Fucci, Klaus Kirsten
In this paper we utilize -function regularization techniques in order to compute the Casimir force for massless scalar fields subject to Dirichlet and Neumann boundary condition…