We are located at the 6th floor of the G.O. Jones Building on the Mile End Campus, midway between Stepney Green and Mile End Tube stations, approximately 1520 minutes from central London on the Central or District lines. If exiting Stepney Green tube station, turn left and walk along the Mile End Road for approximately 300 metres. The G.O. Jones (Physics) building is to the right of the main college building, which is fronted by a clocktower and lawn. If exiting Mile End tube station, turn left and walk approximately 300 metres until you are opposite the main college building. A more detailed description can be found here.
Found at least 20 result(s)
Triangular Seminar Petr Horava (UC Berkeley)
at: 15:00 room Peoples Palace PP01  abstract:

Regular Seminar Radu Tatar (Liverpool U.)
at: 14:00 room G O Jones 610  abstract: Brane construction with certain boundary conditions are used to study knot invariants and Khovanov homology. We argue that sevendimensional manifolds in Mtheory give rise to the topological theories may appear from certain twisting of the Gflux action. We discuss explicit constructions of the sevendimensional manifolds in Mtheory, and show that both the localization equations and surface operators appear naturally from the Hamiltonian formalism of the theories. Knots and link invariants are then constructed using M2brane states in both the models. 
Regular Seminar Axel Kleinschmidt (MPI Potsdam)
at: 14:00 room G O Jones 610  abstract: Exceptional geometry is an attempt to combine the geometric diffeomorphisms and matter gauge transformations in gravitymatter theories into a single geometric structure. I will review recent results associated with a 2+9 split of maximal supergravity where the affine symmetry group E9 plays a central role. The results also provide a general formula that is applicable to many other cases. 
Regular Seminar Kasper Larsen (U. Southampton)
at: 14:00 room G O Jones 610  abstract: A powerful approach to compute multiloop Feynman integrals is to reduce the integrals to a basis of integrals and set up a firstorder linear system of partial differential equations for the basis integrals. In this talk I will discuss the differential equations that arise when the loop integrals are parametrized in Baikov representation. In particular, I give a proof that dimension shifts (which are undesirable) can always be avoided. I will moreover show that in a large class of two and threeloop diagrams it is possible to avoid integrals with squared propagators in the intermediate stages of setting up the differential equations. This is interesting because it implies that the differential equations can be set up using a smaller set of reductions. 
Regular Seminar David Evans ()
at: 14:00 room G O Jones 610  abstract: I will discuss the programme to understand conformal field theory via subfactors and twisted equivariant Ktheory. This has also resulted in a better understanding of the double of the Haagerup subfactor, which was previously thought to be exotic and unrelated to known models. 
Regular Seminar Alexandros Anastasiou (NORDITA)
at: 14:00 room G O Jones 610  abstract: Squaring involves the tensoring between the state content of two super YangMills (sYM) theories to obtain the state content of a supergravity theory. Understanding the YM origin of gravitational symmetries is a powerful tool towards classifying gravity theories which admit such a factorisation. In the first part of the talk I will show how the global symmetries of a pair of sYM theories combine to form those of the corresponding supergravity. In the second part I will discuss how these tools can be further extended to sYM coupled to matter such that squaring can give all ungauged N=2 supergravities with homogeneous scalar manifold. 
Regular Seminar Hans Bantilan (QMUL)
at: 14:00 room G O Jones 610  abstract: The main purpose of this talk is to describe, by way of concrete examples, how the field of numerical relativity now contributes to our understanding of open questions in gravitational collapse, heavyion physics, and turbulence. I will begin by motivating these studies in terms of the physical systems they are intended to clarify,then provide specific examples of how to describe these systems with numerical simulations of asymptotically AdS spacetimes in the fully nonlinear regime of general relativity. 
Regular Seminar Joan Simon (U. of Edinburgh)
at: 14:00 room G O Jones 610  abstract: The relation between black holes and thermodynamics leading to the holographic principle is well known. Formulating thermodynamics as the theory of transformations performing some work or task allows us to reinterpret recent developments in AdS/CFT, such as the holographic description of entanglement entropy, as a measure of the connectivity of space (resource). Whether spacetime in the interior of a black hole also allows an understanding as a resource is an interesting open question. 
Regular Seminar Santiago Cabrera Marquez (Imperial College London)
at: 14:00 room G O Jones 610  abstract: Type IIB superstring brane configurations can have a low energy dynamics described by an effective 3d N=4 gauge theory. The moduli space of the gauge theory is normally a Hyperkähler variety. Singular points in the variety correspond to brane configurations where some fields become massless, giving rise to the Higgs mechanism. I will explain the relevance of a set of theories whose moduli space is the closure of a nilpotent orbit of Lie(F), where F is the flavour symmetry group of the theory. I will show how the mathematical description of the "transverse slice" between two nilpotent orbits can be understood in terms of brane dynamics as a realisation of the Higgs mechanism. 
Triangular Seminar Sanjaye Ramgoolam (QMUL)
at: 11:00 room GO Jones 610  abstract: These lectures will be focused on aspects of combinatorics relevant to gaugestring duality (holography). The physical theories we will discuss include two dimensional Yang Mills theory, fourdimensional N=4 super Yang Mills theory with U(N) gauge group, Matrix and tensor models. The key mathematical concepts include : Schur Weylduality, permutation equivalence classes and associated discrete Fourier transforms as an approach to counting problems and, branched covers and Hurwitz spaces. SchurWeyl duality is a powerful relation between representations of U(N) and representations of symmetric groups. Representation theory of symmetric groups offers a method to define nice bases for functions on equivalence classes of permutations. These bases are useful in counting gauge invariant functions of matrices or tensors, as well as computing their correlators in physical theories. In AdS/CFT these bases have proved useful in identifying local operators in gaugetheory dual to giant gravitons in AdS. In the simplest cases of gaugestring duality, the known mathematics of branched covers and Hurwitz spaces provide the mechanism for the holographic correspondence between gauge invariants and stringy geometry. (Lecture 3: Hermitian matrix model. Tensor models and Permutation centralizer al gebras. Using permutation equivalences to count matrix/tensor invariants and compute correlators. Relations to covering spaces.) 
Triangular Seminar Sanjaye Ramgoolam (QMUL)
at: 11:00 room GO Jones 610  abstract: These lectures will be focused on aspects of combinatorics relevant to gaugestring duality (holography). The physical theories we will discuss include two dimensional Yang Mills theory, fourdimensional N=4 super Yang Mills theory with U(N) gauge group, Matrix and tensor models. The key mathematical concepts include : Schur Weylduality, permutation equivalence classes and associated discrete Fourier transforms as an approach to counting problems and, branched covers and Hurwitz spaces. SchurWeyl duality is a powerful relation between representations of U(N) and representations of symmetric groups. Representation theory of symmetric groups offers a method to define nice bases for functions on equivalence classes of permutations. These bases are useful in counting gauge invariant functions of matrices or tensors, as well as computing their correlators in physical theories. In AdS/CFT these bases have proved useful in identifying local operators in gaugetheory dual to giant gravitons in AdS. In the simplest cases of gaugestring duality, the known mathematics of branched covers and Hurwitz spaces provide the mechanism for the holographic correspondence between gauge invariants and stringy geometry. (Lecture 2: Local gauge invariant operators and Hilbert space of CFTs. Young diagrams and Brane geometries. HalfBPS and quarterBPS. Counting, construction and correlators in group theoretic combinatorics.) 
Regular Seminar Nick Evans (U. Southampton)
at: 14:00 room G O Jones 610  abstract: The NJL model is a classic model of chiral symmetry breaking in QCD and the gauged NJL model underlies many BSM models. I investigate how to apply Witten's double trace prescription in holographic models of quarks to describe NJL interactions. A holographic realisation of NJL and gauged NJL is realised and can be applied to understanding QCD and extended technicolor models. 
Triangular Seminar Sanjaye Ramgoolam (QMUL)
at: 11:00 room GO Jones 610  abstract: These lectures will be focused on aspects of combinatorics relevant to gaugestring duality (holography). The physical theories we will discuss include two dimensional Yang Mills theory, N=4 super Yang Mills theory with U(N) gauge group, Matrix and tensor models. The key mathematical concepts include : Schur Weylduality, permutation equivalence classes and associated discrete Fourier transforms as an approach to counting problems and, branched covers and Hurwitz spaces. SchurWeyl duality is a powerful relation between representations of U(N) and representations of symmetric groups. Representation theory of symmetric groups offers a method to define nice bases for functions on equivalence classes of permutations. These bases are useful in counting gauge invariant functions of matrices or tensors, as well as computing their correlators in physical theories. In AdS/CFT these bases have proved useful in identifying local operators in gaugetheory dual to giant gravitons in AdS. In the simplest cases of gaugestring duality, the known mathematics of branched covers and Hurwitz spaces provide the mechanism for the holographic correspondence between gauge invariants and stringy geometry. (Lecture 1: Two dimensional Yang Mills theory. Exact solution. Large N expansion. Role of SchurWeyl duality  relation between representation theory of symmetric groups and unitary groups. Hurwitz spaces and string interpretation of the large N expansion.) 
Regular Seminar Marcus Sperling (Vienna u.)
at: 14:00 room G O Jones 610  abstract: In this talk, I will discuss the generalised and basic fuzzy 4sphere in the context of the IKKT matrix model. These spaces arise as SO(5)equivariant projections of quantised SO(6) coadjoint orbits and exhibit full SO(5) covariance. I will sketch how (basic and generalised) 4sphere arise as solutions in a YangMills matrix model, such that the fluctuations on the 4sphere lead to a higherspin gauge theory. 
Regular Seminar James Drummond (U. Southampton)
at: 14:00 room G O Jones 610  abstract: I will describe how to recast perturbative quantumgravity using nonperturbative techniques from conformal field theory,focussing on the case of N=4 super YangMills theory. By resolving thedegeneracy among double trace operators at large N we are able to bootstraponeloop supergravity corrections from the OPE of the CFT. 
Triangular Seminar David Tong (DAMTP)
at: 15:00 room GO Jones Lecture Theatre  abstract: I'll give a basic introduction to particlevortex duality in d=2+1 dimensions and its relation to 3d bosonization. 
Regular Seminar Daniel Thompson (Swansea U.)
at: 16:00 room G O Jones 610  abstract: In this talk I shall give a review of two classes of integrable nonlinear sigma models called \eta and \lambda deformations. Three reasons to be interested are 1) these are interesting examples of relatively rare integrable QFT displaying quantum group symmetries; 2) viewed as string theory sigma models they may have application to N=4 SYM via holography and 3) they provide concrete examples for generalised notions of Tduality. This talk will describe a variety of classical and quantum properties of these theories and their multiparameter extensions drawing in part on arXiv:1711.00084; arXiv:1706.05322 
Regular Seminar Luigi Tizzano (Uppsala U.)
at: 14:00 room GO Jones 610  abstract: Integrable lattice models in 1+1 dimensions have been a topic of much fascination in physics since the early days of quantum mechanics. Recently, a work by Costello has offered a new perspective on these models based on a 4D topological gauge theory. An interesting aspect of this proposal is the close connection with 3D ChernSimons theory and knot invariants. I will explain how to derive the 4D topological theory using string dualities and localization techniques for a 5D twisted super YangMills theory. Finally, I will explain how this construction might relate to other appearances of Yangian symmetry which played a prominent role in AdS/CFT physics. This is a joint work in progress with Joe Minahan. 
Regular Seminar Christopher Couzens (King's Coll. London)
at: 14:00 room G O Jones 610  abstract: In this talk we consider holographic duals of Ftheory solutions to 2d SCFT's. We approach the problem by classifying a particular class of solutions of type IIB supergravity with AdS_3 factors and varying axiodilaton. The class of solutions we discuss consist of D3 and 7brane configurations and naturally fall into the realm of Ftheory. We prove that for (0,4) supersymmetry in 2d the solutions are essentially unique and we match the holographic central charges to field theory results. We comment on future directions, including AdS_3 solutions of Ftheory, preserving different amounts of supersymmetry. 
Regular Seminar Inaki Garcia Etxebarria (MPI Munich)
at: 2:00 room G.O. Jones 610  abstract:
