Triangle Seminars
Tuesday, 23 Feb 2010
Matrix models, 2d CFTs and 4d N=2 gauge theories
Niclas Wyllard
(Chalmers University)
Abstract:
We review the recently uncovered connections between three classes of theories: A_r quiver matrix models, d=2 conformal A_r Toda field theories and d=4 N=2 conformal A_r quiver gauge theories
We review the recently uncovered connections between three classes of theories: A_r quiver matrix models, d=2 conformal A_r Toda field theories and d=4 N=2 conformal A_r quiver gauge theories
Posted by: KCL
Wednesday, 24 Feb 2010
N=2 superconformal theories, M5 branes and (p,q)-webs
📍 London
Sergio Benvenuti
(Imperial)
Abstract:
In 2009 there has been progress in understanding and classifying the set of four dimensional field theories with N=2 SUSY. These models arise as M5 branes wrapped over a Riemann surface. We review this construction and describe a five dimensional point of view, using (p,q)-webs of 5branes in Type IIB string theory. This point of view makes many properties of the theories explicit. We will also touch on the AGT correspondence, that associates a 2-dimensional CFT, similar to the Liouville CFT, to the protected sector of four dimensional N=2 models.
In 2009 there has been progress in understanding and classifying the set of four dimensional field theories with N=2 SUSY. These models arise as M5 branes wrapped over a Riemann surface. We review this construction and describe a five dimensional point of view, using (p,q)-webs of 5branes in Type IIB string theory. This point of view makes many properties of the theories explicit. We will also touch on the AGT correspondence, that associates a 2-dimensional CFT, similar to the Liouville CFT, to the protected sector of four dimensional N=2 models.
Posted by: KCL
Inching Towards Strange Metallic Holography
David Tong
(DAMTP, Cambridge)
Abstract:
Strange metals are materials with numerous anomalous properties.
The flow of electricity cannot be explained in the familiar language of a
fluid of individual electrons, but instead requires a new strongly
interacting description. In this talk, I will review some basic facts
about these materials. With this as motivation, I will explain how to
compute conductivity in certain strongly interacting, non-relativistic
field theories which are defined holographically.
Strange metals are materials with numerous anomalous properties.
The flow of electricity cannot be explained in the familiar language of a
fluid of individual electrons, but instead requires a new strongly
interacting description. In this talk, I will review some basic facts
about these materials. With this as motivation, I will explain how to
compute conductivity in certain strongly interacting, non-relativistic
field theories which are defined holographically.
Posted by: IC
Thursday, 25 Feb 2010
Instabilities and new phases of higher dimensional vacuum rotating black holes
Pau Figueras
(Durham)
Abstract:
In this talk I will first review the recent progress made towards
finding instabilities of rotating vacuum black holes in higher
dimensions. I will show that singly spinning Myers-Perry black holes
exhibit an infinite sequence of zero modes that should connect them to
other black hole phases such as black rings and black saturns. In the
second part of my talk I will describe the gravitational instabilities
of Myers-Perry black holes with all the angular momenta equal. The
onset of instability is associated with the appearance of
time-independent perturbations which generically break all but one of
the rotational symmetries. In nine spacetime dimensions, this is
interpreted as evidence for the existence of a new 70-parameter family
of black hole solutions with only a single rotational symmetry.
In this talk I will first review the recent progress made towards
finding instabilities of rotating vacuum black holes in higher
dimensions. I will show that singly spinning Myers-Perry black holes
exhibit an infinite sequence of zero modes that should connect them to
other black hole phases such as black rings and black saturns. In the
second part of my talk I will describe the gravitational instabilities
of Myers-Perry black holes with all the angular momenta equal. The
onset of instability is associated with the appearance of
time-independent perturbations which generically break all but one of
the rotational symmetries. In nine spacetime dimensions, this is
interpreted as evidence for the existence of a new 70-parameter family
of black hole solutions with only a single rotational symmetry.
Posted by: QMW