Triangle Seminars
Tuesday, 27 Nov 2007
The vertex operator approach to dynamical structure functions
Robert Weston
(Hariot-Watt University, Edinburgh)
Abstract:
I shall present a review of the vertex operator approach to solvable lattice models. I shall briefly describe how this technique is being applied to the computation of dynamical structure functions - the latter being directly assessable via neutron scattering experiments.
I shall present a review of the vertex operator approach to solvable lattice models. I shall briefly describe how this technique is being applied to the computation of dynamical structure functions - the latter being directly assessable via neutron scattering experiments.
Posted by: KCL
On the top eigenvalue and density of states of heavy tailed random matrices: theory and comparison to financial data
Giulio Biroli
(CEA Saclay)
Wednesday, 28 Nov 2007
Physical and Mathematical Challenges of AdS/CFT Integrability
📍 London
Matthias Staudacher
(Potsdam)
Generalized Kahler Potentials for Supergravity
Nick Halmagyi
(Chicago University, EFI)
Abstract:
I will discuss the targetspace manifestation of the most general (2,2) sigma models with H flux, these include chiral, twisted chiral and semi chiral superfields. I will describe the appearance of a generalized Kahler potential and also outline the use of the deformation space of generalized complex structures in supergravity.
I will discuss the targetspace manifestation of the most general (2,2) sigma models with H flux, these include chiral, twisted chiral and semi chiral superfields. I will describe the appearance of a generalized Kahler potential and also outline the use of the deformation space of generalized complex structures in supergravity.
Posted by: IC
Representation theory and integrable spin chains
Petr Kulish
(St.Petersburg Department of Steklov Institute of Mathematics)
Abstract:
Solution of the Heisenberg spin chain s=1/2 (spectrum of the energy operator and its eigenvectors) is related with three algebras: the Lie algebra sl(2), group algebra of symmetric group S_N and an infinite dimentional Hopf algebra, Yangian Y(sl(2)). Using representaions of these algebras there are generalization of this model to higher spins s=1, 3/2, 2,
...However there is also possibility to geberalize these algebras preserving structure of their representations. In particular the group algebra of S_N will be substituted by the Temperle – Lieb algebra.
Solution of the Heisenberg spin chain s=1/2 (spectrum of the energy operator and its eigenvectors) is related with three algebras: the Lie algebra sl(2), group algebra of symmetric group S_N and an infinite dimentional Hopf algebra, Yangian Y(sl(2)). Using representaions of these algebras there are generalization of this model to higher spins s=1, 3/2, 2,
...However there is also possibility to geberalize these algebras preserving structure of their representations. In particular the group algebra of S_N will be substituted by the Temperle – Lieb algebra.
Posted by: KCL