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Department of Mathematics,
University of Surrey,
Guildford, GU2 7XH, United Kingdom.
     

  Fields, Strings and Geometry Seminars

   These are the research seminars of the Fields, Strings and Geometry Group in the Department of Mathematics at the University of Surrey.

   Time and date:    Our regular seminar slot is 14:00-15:00 or 16:00-17:00 on Tuesdays during term.
   Venue:                 39 AA 04.
   Open to:              Staff and PGR students.

   For further information, please see the Fields, Strings and Geometry Group Seminars in the Department of Mathematics at the University of Surrey, or contact the organiser Andrea Prinsloo.

  Upcoming Seminars

14:00-15:00 on Tuesday 4 September 2018
Andrea Fontanella (University of Surrey)
Black Horizons and Integrable Structures in String Theory (link to event)
This talk is an overview of my doctoral research, which focused on geometric aspects of black holes and integrable structures in string theory. The first part will be devoted to the study of symmetries of the horizon and its bulk extension. The horizon conjecture states that any horizon in any supergravity theory admits at least an sl(2,ℝ) isometry algebra. We shall consider the horizon conjecture beyond the supergravity approximation and show that standard global techniques, which are instrumental in the proof of the horizon conjecture, can no longer be applied. A sufficient condition to establish the horizon conjecture will be identified. As a consequence of our analysis, we find a no-go theorem for AdS2 backgrounds in heterotic theory. The bulk extension of a prescribed near-horizon geometry will also be considered. The horizon fields will be expanded at first order in the radial coordinate and the space of first order radial deformations will be shown to be finite dimensional.
In the second part, geometric aspects and spectral properties of integrable anti-de Sitter backgrounds will be discussed. We sketch our formulation of a Bethe ansatz in AdS2×S2×T6 type IIB superstring, which relies on the free-fermion condition and overcomes the problem of the lack of a pseudo-vacuum state. In AdS3×S3×T6 type IIB superstring, we show that the S-matrix is annihilated by the boost generator of the q-deformed Poincaré superalgebra, and interpret this condition as a parallel equation for the S-matrix with respect to a connection on a fibre bundle. This suggests that the algebraic problem of finding the S-matrix can be geometrically rewritten, leading to a potential notion of a Universal S-matrix. 

  Past Seminars

15:00-16:00 on Wednesday 20 June 2018
Oleg Smolyanov (Moscow State University)
Hamiltonian method of the second quantization

16:00-17:00 on Tuesday 29 May 2018
Christian Saemann (Heriot-Watt University)
Symmetries from Derived Brackets in Generalized Geometry and Beyond

16:00-17:00 on Tuesday 15 May 2018
Jan Gutowski (University of Surrey)
Highly Supersymmetric AdS Solutions

16:00-17:00 on Tuesday 24 April 2018
Mario Garcia-Fernandez (Autonomous University of Madrid)
Canonical metrics on holomorphic Courant algebroids

16:00-17:00 on Tuesday 6 March 2018
Marc-Antoine Fiset (University of Oxford)
Heterotic G2 moduli and worldsheet BRST operator

16:00-17:00 on Tuesday 20 February 2018
Silvia Penati (University of Milano-Bicocca)
ABJM theory: A Matrix Model for latitude Wilson loops

16:00-17:00 on Tuesday 13 February 2018
Lorenzo Raspollini (University of Surrey)
Perturbative Quantisation of Gauge Theories (Part 3)

16:00-17:00 on Tuesday 9 January 2018
Benjo Fraser (Chulalongkorn University, Bangkok)
Non-abelian T-duality and coset CFTs

14:00-15:00 on Friday 5 January 2018
Jeff Murugan (University of Cape Town)
A 2-dimensional random supersymmetric model with disorder

14:00-15:00 on Tuesday 13 December 2017
Renzo Ricca (University of Milano-Bicocca)
Quantifying topological complexity by knot polynomials

16:00-17:00 on Tuesday 5 December 2017
Luca Cassia (University of Milano-Bicocca)
4D N=1,2,3,4 SCFTs on a Riemann Surface

16:00-17:00 on Tuesday 21 November 2017
Lorenzo Raspollini (University of Surrey)
Perturbative Quantisation of Gauge Theories (Part 2)

16:00-17:00 on Tuesday 14 November 2017
Marius de Leeuw (Trinity College, Dublin)
One- and Two-point functions in AdS/dCFT

16:00-17:00 on Tuesday 7 November 2017
Lorenzo Raspollini (University of Surrey)
Perturbative Quantisation of Gauge Theories (Part 1)

14:00-15:00 on Tuesday 31 October 2017
Oleg Smolyanov (Moscow State University)
Transformations of Feynman Path Integrals and Quantum Anomalies

16:00-17:00 on Tuesday 24 October 2017
Alexander Schenkel (University of Nottingham)
The stack of Yang-Mills fields

16:00-17:00 on Tuesday 10 October 2017
Pau Figueras (Queen Mary, University of London)
Non-spherically symmetric collapse in asymptotically AdS spacetimes