[Todos] CERN Winter School, Feb. 2009.

[Gaston Giribet]

Hola,

Escribo para re-enviar el anuncio de la edición 2009 de la CERN Winter 
School on Supergravity, Strings and Gauge Theories, a realizarse en 
Ginebra, Suiza, entre el 9 de febrero y el 13 de febrero de 2009. El link 
de la home-page de la escuela es:

       http://indico.cern.ch/conferenceProgram.py?confId=37753

En particular, en esta edición de la escuela, unos colegas y yo 
organizamos uno de los workgroups, dedicado éste a los avances recientes 
sobre Gravedad Cuántica en Tres Dimensiones. Por esto, agradecería que 
hiciesen difusión al respecto. La actividad que organizamos es una de las 
partes orgánicas de la escuela, y el link con los detalles es:

     http://indico.cern.ch/internalPage.py?pageId=2&confId=37753

Al final de este e-mail detallo los temas del workshop.

Agradecería a ustedes que difundiesen esta actividad entre aquéllos que, 
según su criterio, podrían llegar a estar interesados.

Un saludo,
Gaston,

    Three Dimensional Gravity Theories and the Kerr/CFT Correspondence
  (at the CERN Winter School on Supergravity, Strings and Gauge Theories)

Organizers:  S. Detournay (INFN, Milano)
              G. Giribet (UBA, Buenos Aires)
              M. Guica (LPTHE, Paris)

Abstract:

In the last year and a half there has been a revived interest in 
three-dimensional theories of gravity. The proposal by E. Witten [1] that 
2+1 D Einstein gravity in AdS_3 space is dual to a holomorphically 
factorizable theory of the class known as extremal CFT_2 has attracted 
considerable attention, and led to intense debate. Another model of 2+1 D 
gravity, Topologically Massive Gravity (TMG), corresponds to the 
three-dimensional Einstein gravity coupled to a gravitational Chern-Simons 
term without torsion [3]. This theory contains local massive graviton 
degrees of freedom, and admits black hole solutions, making TMG a very 
interesting model to be explored. Moreover, its holographic description in 
terms of a 2d CFT exhibits special properties when the square of the 
Chern-Simons coupling equals the cosmological constant. The central charge 
of left-moving excitations in the boundary theory vanishes, leading to the 
still controversial [4] suggestion that the theory might be chiral [5]. 
The generalization of TMG to other backgrounds, in particular warped 
versions of AdS_3, has led to fabulous applications such as describing 
extremally rotating Kerr four-dimensional black holes [6].

The work-group will start with a short review about recent progress in 
three-dimensional gravity, with particular attention on AdS_3/CFT_2 
correspondence (review of the original works [1,2], followed by a recap of 
the state-of-the art in TMG, and the connection with the Kerr/CFT 
conjecture). Next, according to the participants' taste/interest, we'll 
launch an open discussion on some topics of current research interest, 
e.g. the chiral gravity conjecture, the Kerr/CFT correspondence for 
non-extremal black holes, warped backgrounds in string theory, 
relationship with AdS_4/CFT_3 correspondence, etc.

[1] E. Witten, Three-dimensional gravity reconsidered, [arXiv:0706.3359]

[2] A. Maloney and E. Witten, Quantum gravity partition function in 
three-dimensions, [arXiv:0712.0155].

[3] S. Deser, R. Jackiw and S. Templeton, Phys. Rev. Lett. 48 (1982) 975

[4] G. Giribet, M. Kleban and M. Porrati, Topologically Massive Gravity at 
the Chiral Point is not Unitary, JHEP 10 (2008) 045, [arXiv:0807.4703].

[5] W. Li, W. Song and A. Strominger, Chiral Gravity in Three Dimensions, 
JHEP04 (2008) 082, [arXiv:0801.4566].

[6] M. Guica, T. Hartman, W. Song and A. Strominger, The Kerr/CFT 
Correspondence, [arXiv:0809.4266].