Zobrazeno 1 - 10
of 356
pro vyhledávání: '"PERRY, M. J."'
We compute the one-loop beta functions of the cosmological constant, Newton's constant and the topological mass in topologically massive supergravity in three dimensions. We use a variant of the proper time method supplemented by a simple choice of c
Externí odkaz:
http://arxiv.org/abs/1302.0868
Publikováno v:
Nucl.Phys.B826:71-86,2010
It is commonly asserted that there is a \hat G\times G centreless Kac-Moody extension of the manifest G\times G global symmetry of the two-dimensional principal chiral model (PCM) for the group manifold G. Here, we show that the symmetry is in fact l
Externí odkaz:
http://arxiv.org/abs/0812.2218
Publikováno v:
Nucl.Phys.B806:656-683,2009
In an earlier paper we studied the infinite-dimensional symmetries of symmetric-space sigma models (SSMs) in a flat two-dimensional spacetime. Here, we extend our investigation to the case of two-dimensional SSMs coupled to gravity. These theories ar
Externí odkaz:
http://arxiv.org/abs/0712.0615
It has long been appreciated that the toroidal reduction of any gravity or supergravity to two dimensions gives rise to a scalar coset theory exhibiting an infinite-dimensional global symmetry. This symmetry is an extension of the finite-dimensional
Externí odkaz:
http://arxiv.org/abs/0711.0400
Publikováno v:
Phys.Rev.D74:084009,2006
We reformulate the Bekenstein bound as the requirement of positivity of the Helmholtz free energy at the minimum value of the function L=E- S/(2\pi R), where R is some measure of the size of the system. The minimum of L occurs at the temperature T=1/
Externí odkaz:
http://arxiv.org/abs/hep-th/0606186
Publikováno v:
Phys.Rev.Lett.95:231601,2005
We show that if one chooses the Einstein Static Universe as the metric on the conformal boundary of Kerr-AdS spacetime, then the Casimir energy of the boundary conformal field theory can easily be determined. The result is independent of the rotation
Externí odkaz:
http://arxiv.org/abs/hep-th/0507034
Publikováno v:
Phys.Rev.D72:084028,2005
We show that one may pass from bulk to boundary thermodynamic quantities for rotating AdS black holes in arbitrary dimensions so that if the bulk quantities satisfy the first law of thermodynamics then so do the boundary CFT quantities. This corrects
Externí odkaz:
http://arxiv.org/abs/hep-th/0506233
Publikováno v:
Class.Quant.Grav.22:1503-1526,2005
We obtain expressions for the mass and angular momenta of rotating black holes in anti-de Sitter backgrounds in four, five and higher dimensions. We verify explicitly that our expressions satisfy the first law of thermodynamics, thus allowing an unam
Externí odkaz:
http://arxiv.org/abs/hep-th/0408217
Publikováno v:
Phys.Lett. B609 (2005) 7-12
We propose an approach to explaining why naive large quantum fluctuations are not the right estimate for the cosmological constant. We argue that the universe is in a superposition of many vacua, in such a way that the resulting fluctuations are supp
Externí odkaz:
http://arxiv.org/abs/hep-ph/0408169
We argue that in the context of string theory a large number N of connected degenerate vacua that mix will lead to a ground state with much lower energy, essentially because of the standard level repulsion of quantum theory for the wavefunction of th
Externí odkaz:
http://arxiv.org/abs/hep-th/0311152