Triangle Seminars
July 2004
Wed
28 Jul 2004
WZW Patterns in Reflection Algebras
📍 London
Rafal R. Suszek
(King's College London and Warsaw University)
Abstract:
The talk shall present chosen aspects of a compact
quantum-algebraic description of D-brane geometry in WZW models, extending
beyond the semiclassical approximation of the original fuzzy matrix
models.
It shall be argued that a class of unital algebras - the so-called
Reflection Algebras intimately related to Drinfeld–Jimbo algebras -
captures certain essential features of stringy geometries, both untwisted
and twisted, in compact WZW models and their (simple current) orbifolds,
while giving rise to some well-known, and some less so, noncommutative
geometries (e.g. Podles sphere, quantum projective plane).
The talk shall present chosen aspects of a compact
quantum-algebraic description of D-brane geometry in WZW models, extending
beyond the semiclassical approximation of the original fuzzy matrix
models.
It shall be argued that a class of unital algebras - the so-called
Reflection Algebras intimately related to Drinfeld–Jimbo algebras -
captures certain essential features of stringy geometries, both untwisted
and twisted, in compact WZW models and their (simple current) orbifolds,
while giving rise to some well-known, and some less so, noncommutative
geometries (e.g. Podles sphere, quantum projective plane).
Posted by: KCL
Thu
22 Jul 2004
Form factors and correlation functions in affine Toda field theories
Michael Karowski
(FU Berlin)
Wed
14 Jul 2004
Derivative Corrections from deformed superembeddings ( the D9-brane )
📍 London
Sven Kerstan
(KCL)
Abstract:
We will illustrate some of the consequences of allowing for a
fundamental length scale in
supersymmetric theories, in particular the world volume theory of the
D9-brane.
We will show how to construct kappa-symmetric derivative corrections
using superembeddings
and spinorial cohomology.
We will illustrate some of the consequences of allowing for a
fundamental length scale in
supersymmetric theories, in particular the world volume theory of the
D9-brane.
We will show how to construct kappa-symmetric derivative corrections
using superembeddings
and spinorial cohomology.
Posted by: KCL
Tue
13 Jul 2004
1. Non-commutative gauge theories and 2. Localized closed string tachyons
Swarnendu Sarkar
(Inst for Mathematical Sciences, Chennai)
Abstract:
This is a joint seminar of KCL and QMW.
This is a joint seminar of KCL and QMW.
Posted by: KCL
June 2004
Mon
14 Jun 2004
Large spin limits of AdS-CFT and generalized Landau-Lifshitz equations
Bogdan Stefanski
(Imperial College London)
Fri
11 Jun 2004
The Chen-Lebrun-Weber metric and numerical solutions for toric surfaces
Simon Donaldson
(Imperial)
Abstract:
The talk will have two themes. The first is to give an account of recent work of Chen, LeBrun and Weber, proving the existence of a new Einstein metric on a certain 4-manifold. The second will describe a general class of numerical solutions to Calabi's extremal metric equation. The two themes are related by the fact that the metric of Chen, LeBrun and Weber is conformal to an extremal metric, so explicit geometric information can be obtained.
The talk will have two themes. The first is to give an account of recent work of Chen, LeBrun and Weber, proving the existence of a new Einstein metric on a certain 4-manifold. The second will describe a general class of numerical solutions to Calabi's extremal metric equation. The two themes are related by the fact that the metric of Chen, LeBrun and Weber is conformal to an extremal metric, so explicit geometric information can be obtained.
Posted by: IC
Wed
9 Jun 2004
Loop quantum cosmology
Martin Bojowald
(AEI Potsdam)
Tue
8 Jun 2004
Inflation and Realistic String Models
Fernando Quevedo
(Cambridge)
Mon
7 Jun 2004
The Geometry of Non-Geometric String Backgrounds
Christopher Hull
(Imperial College London)
Fri
4 Jun 2004
Dualities of Mass Deformed Quiver Gauge Theories
Nick Halmagyi
(U. Southern California)
Thu
3 Jun 2004
A new deconstruction of little string theory
Nick Dorey
(University of Wales at Swansea)
Tue
1 Jun 2004
The Standard Model: Where does it come from ?
📍 London
Qaisar Shafi
(Bartol Institute, Newark)
Abstract:
Some attempts to go beyond the standard model will be
reviewed, largely motivated by data from neutrino
experiments and the microwave anisotropy observations.
An attempt at a unified description will be discussed.
Some attempts to go beyond the standard model will be
reviewed, largely motivated by data from neutrino
experiments and the microwave anisotropy observations.
An attempt at a unified description will be discussed.
Posted by: KCL
Tue
1 Jun 2004
Differential geometry with B-fields
Nigel Hitchin
(Oxford)
Tue
1 Jun 2004
Sp(0) and Orientifolds
Karl Landsteiner
(Madrid)
Tue
1 Jun 2004
Spin chain sigma models and string theory
Esperanza Lopez
(Madrid)
May 2004
Tue
25 May 2004
Entanglement Entropy in Quantum Field Theory
John Cardy
(Oxford)
Tue
25 May 2004
A Stringy Laboratory for Closed Timelike Curves and Cosmological Singularities
Clifford Johnson
(USC)
Mon
24 May 2004
A Stringy Laboratory for Closed Timelike Curves and Cosmological Singularities
📍 London
Clifford Johnson
(USC)
Wed
19 May 2004
Compactification with fluxes and generalised complex geometry
📍 London
Michela Petrini
(Centre de Physique Theorique, Ecole Polytechnique)
Tue
18 May 2004
Quantum Gravitational Optics, Lorentz and CPT Violation, Anti-hydrogen Spectroscopy and GRB Polarimetry
Graham Shore
(Swansea)
Thu
13 May 2004
New AdS_5 solutions in String and M-theory
Dan Waldram
(IC)
Mon
10 May 2004
On N=1 supersymmetric boundary bootstrap
📍 London
Gabor Toth
(KCL)
Abstract:
The general subject is factorized scattering theory for massive integrable
field theories in 1+1 dimensions. The talk will be about boundary
supersymmetry, about a construction of supersymmetric scattering and
reflection matrices from non-supersymmetric ones, and about the
application of the construction to specific models (boundary sine-Gordon
model, boundary affine Toda theories) perhaps.
The general subject is factorized scattering theory for massive integrable
field theories in 1+1 dimensions. The talk will be about boundary
supersymmetry, about a construction of supersymmetric scattering and
reflection matrices from non-supersymmetric ones, and about the
application of the construction to specific models (boundary sine-Gordon
model, boundary affine Toda theories) perhaps.
Posted by: KCL
Mon
10 May 2004
On KE(9)
Hermann Nicolai
(Albert Einstein Institut Golm)
Thu
6 May 2004
Closed Strings in Misner Universe
Boris Pioline
(LPTHE, Universite de Paris VI et VII)
April 2004
Thu
29 Apr 2004
Integrable Spin Chains and Planar N=4 Super Yang-Mills
Niklas Beisert
(Albert Einstein Institut Golm)
Mon
5 Apr 2004
Kac-Moody Symmetries of (Super)Gravity Theories
📍 London
Igor Schnakenburg
(Hebrew University)
Abstract:
A self-contained introduction to the idea of identifying Kac-Moody type
symmetries in all known gravity theories.
A self-contained introduction to the idea of identifying Kac-Moody type
symmetries in all known gravity theories.
Posted by: KCL
Thu
1 Apr 2004
Soft terms on D-branes from flux supersymmetry breaking
Angel Uranga
(Madrid)
March 2004
Wed
31 Mar 2004
Localization of gravity in string theory
📍 London
Pierre Vanhove
(SPhT Saclay)
Abstract:
We will present a string scenario for localization of gravity in four dimensions. We will discuss the field theory model, proposed by Dvali Gabadadze and Porrati and details its problems and their resolutions. We will explain that this model presents issues well posed in string theory and address their resolution in this context.
We will present a string scenario for localization of gravity in four dimensions. We will discuss the field theory model, proposed by Dvali Gabadadze and Porrati and details its problems and their resolutions. We will explain that this model presents issues well posed in string theory and address their resolution in this context.
Posted by: KCL
Mon
29 Mar 2004
E_11: sign of the times
Arjan Keurentjes
(Vrije Universiteit Brussel)
Thu
18 Mar 2004
Quotients of AdS(p+1)xS(q)
Simon Ross
(University of Durham)
Thu
18 Mar 2004
Effective N=1 Super Yang-Mills Theories versus Lattice Results
Jan Louis
(Universitaet Hamburg)
Wed
17 Mar 2004
String Compactifications on N=1 Calabi-Yau orientifolds with D-branes and Background Flux
📍 London
Jan Louis
(Hamburg University)
Mon
15 Mar 2004
Chirality Change in String Theory
📍 London
Dimitrios Tsimpis
(KCL)
Thu
11 Mar 2004
Yukawa textures and the Froggatt-Nielsen mechanism
Tim Jones
(CERN and University of Liverpool)
Thu
11 Mar 2004
TBA
Constantin Bachas
(Ecole Normale Superieure Paris)
Wed
10 Mar 2004
Informal introduction to matrix theory
📍 London
Sanjaye Ramgoolam
(QMW)
Wed
10 Mar 2004
Review of Perturbative Gauge Theory as a String Theory in Twistor Space (Witten) and related work
Mohab Abou Zeid
(Imperial College London)
Fri
5 Mar 2004
Some new results concerning Abelian Higgs vortices
Nick Manton
(DAMTP University of Cambridge)
Thu
4 Mar 2004
From brane dynamics to a Kac-Moody invariant formulation of M-theories
Laurent Houart
(Universite Libre de Bruxelles)
Wed
3 Mar 2004
WZW models at critical level
📍 London
Ioannis Bakas
(University of Patras)
Tue
2 Mar 2004
Ricci flows, tachyon condensation and infinite dimensional algebras
Ioannis Bakas
(University of Patras)
February 2004
Thu
26 Feb 2004
Strings on zero radius AdS and free field theory
Prem Kumar
(DAMTP University of Cambridge)
Thu
26 Feb 2004
Mirror symmetric SU(3)–structure manifolds with NS flux
Alessandro Tomasiello
( (Ecole Polytechnique de Paris))
Wed
25 Feb 2004
Aspects of M5 brane dynamics
📍 London
David Berman
(Queen Mary College)
Fri
20 Feb 2004
S-duality, Deconstruction and Confinement for marginal deformations of N eq 4 SUSY Yang-Mills
Nick Dorey
(University of Wales Swansea)
Thu
19 Feb 2004
Five-branes, the strong-coupling problem and AdS3 landscape
Marios Petropoulos
(Ecole Polytechnique de Paris)
Wed
18 Feb 2004
Transient Quintessence from Group Manifold Reductions
📍 London
Eric Bergshoeff
(University of Groningen)
Fri
13 Feb 2004
TBA
Dimitrios Tsimpis
(King's College)
Wed
11 Feb 2004
Giant Gravitons in Gauged Supergravity
📍 London
Douglas Smith
(University of Durham)
Mon
9 Feb 2004
B-type branes in Landau-Ginzburg models
📍 London
Ilka Brunner
(KCL)
Abstract:
There is a proposal by Kontsevich how these branes should be described. He didn't write it up, but it has been reviewed in the paper
math.AG/0302304, by D.Orlov.
Some relations to physics are scattered around, there is a series of papers by Kapustin and Li, I have written a paper with Herbst, Lerche, Scheuner.
The latest physics papers are the two recent papers Diaconescu etal hep-th/0401135, which is I think very interesting, and Hori, hep-th/0401139.
There is a proposal by Kontsevich how these branes should be described. He didn't write it up, but it has been reviewed in the paper
math.AG/0302304, by D.Orlov.
Some relations to physics are scattered around, there is a series of papers by Kapustin and Li, I have written a paper with Herbst, Lerche, Scheuner.
The latest physics papers are the two recent papers Diaconescu etal hep-th/0401135, which is I think very interesting, and Hori, hep-th/0401139.
Posted by: quella
Fri
6 Feb 2004
D-branes, supersymmetry breaking and the smallness of the cosmological constant
Carlo Angelantonj
(CERN)