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 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.) 
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:

Regular Seminar ChongSun Chu (NCTS, Hsinchu and Taiwan, Natl. Tsing Hua U.)
at: 11:30 room 610  abstract: In this talk, I will discuss about the holography of boundary Conformal Field theory. I will show how boundary Weyl Anomaly can be obtained from holography. New universal relations between the shape dependence of Casimir effects and boundary Weyl anomaly will also be pointed out and discussed from the point of view of holography. 
Regular Seminar Benjamin Doyon (KCL)
at: 14:00 room GO Jones 610  abstract: The talk is based on a very recent work of the speaker on generalising Zamolodchikov's ctheorem to nonunitary theories. 
Informal Seminar Ricardo Monteiro (QMUL)
at: 10:30 room GO Jones 610  abstract: I will give an introduction to current topics in the study of scattering amplitudes of gauge theory and gravity. There will be four twohour lectures, and the plan is as follows. Lecture 1 will review basic modern techniques for scattering amplitudes, including recursion relations. Lecture 2 will present an overview of the relations describing gravity as a double copy of gauge theory, both for scattering amplitudes and for solutions to the equations of motion. Lecture 3 will introduce the formalism of the scattering equations, leading to the CHY formulas for amplitudes in theories of massless particles. Lecture 4 will present new developments in computing fieldtheory amplitudes from stringtheoryinspired techniques, via a new type of worldsheet model known as ambitwistor string. This leads to an extension of the scattering equations to loop level. 
Informal Seminar Ricardo Monteiro (QMUL)
at: 10:30 room GO Jones 610  abstract: I will give an introduction to current topics in the study of scattering amplitudes of gauge theory and gravity. There will be four twohour lectures, and the plan is as follows. Lecture 1 will review basic modern techniques for scattering amplitudes, including recursion relations. Lecture 2 will present an overview of the relations describing gravity as a double copy of gauge theory, both for scattering amplitudes and for solutions to the equations of motion. Lecture 3 will introduce the formalism of the scattering equations, leading to the CHY formulas for amplitudes in theories of massless particles. Lecture 4 will present new developments in computing fieldtheory amplitudes from stringtheoryinspired techniques, via a new type of worldsheet model known as ambitwistor string. This leads to an extension of the scattering equations to loop level. 
Informal Seminar Ricardo Monteiro (QMUL)
at: 10:00 room GO Jones 610  abstract: I will give an introduction to current topics in the study of scattering amplitudes of gauge theory and gravity. There will be four twohour lectures, and the plan is as follows. Lecture 1 will review basic modern techniques for scattering amplitudes, including recursion relations. Lecture 2 will present an overview of the relations describing gravity as a double copy of gauge theory, both for scattering amplitudes and for solutions to the equations of motion. Lecture 3 will introduce the formalism of the scattering equations, leading to the CHY formulas for amplitudes in theories of massless particles. Lecture 4 will present new developments in computing fieldtheory amplitudes from stringtheoryinspired techniques, via a new type of worldsheet model known as ambitwistor string. This leads to an extension of the scattering equations to loop level. 
Informal Seminar Ricardo Monteiro (QMUL)
at: 10:00 room GO Jones 610  abstract: I will give an introduction to current topics in the study of scattering amplitudes of gauge theory and gravity. There will be four twohour lectures, and the plan is as follows: Lecture 1 will review basic modern techniques for scattering amplitudes, including recursion relations. Lecture 2 will present an overview of the relations describing gravity as a double copy of gauge theory, both for scattering amplitudes and for solutions to the equations of motion. Lecture 3 will introduce the formalism of the scattering equations, leading to the CHY formulas for amplitudes in theories of massless particles. Lecture 4 will present new developments in computing fieldtheory amplitudes from stringtheoryinspired techniques, via a new type of worldsheet model known as ambitwistor string. This leads to an extension of the scattering equations to loop level. 
Exceptional Seminar Paolo Di Vecchia (NBI/Nordita)
at: 12:00 room GO Jones LG7  abstract: In this talk we will discuss how gauge invariance fixes the soft behavior of massless particles as photons, gluons, gravitons, dilatons and KalbRamond field. We will then check these results in string theory and we will show that the subsubleading behavior for gravitons includes string corrections in the bosonic and heterotic strings, but not in superstring. They are consequence of the fact that the threegraviton amplitude has string corrections with respect to the field theoretical one. It turns out, instead, that the soft behavior of the dilaton has no string corrections and, in particular, involves the generators of dilatations and special conformal transformations. We then study the soft behavior of the Goldstone boson, called in the literature also dilaton, that one gets when one breaks spontaneously the conformal symmetry and we show that its soft behavior is very similar, but not identical, to that of the string dilaton. 
Regular Seminar Elli Pomoni (DESY)
at: 14:00 room 610  abstract: We will introduce a large class of N=1 superconformal theories Sk which is obtained from Gaiottoâ€™s N=2 class S via orbifolding. We will study the Coulomb branch of the theories in the class by constructing and analyzing their spectral curves. Using our experience from the N=2 AGT correspondence we will search for a 2D/4D relations (AGTk) for the N=1 theories of class Sk. From the curves we will identify the 2D CFT symmetry algebra and its representations, namely the conformal blocks of the Virasoro/Walgebra, that underlie the 2D theory and reproduce the SeibergWitten curves of the N = 1 gauge theories. We find that the blocks corresponding to the SU(N) Sk gauge theories involve fields in certain nonunitary representations of the WkN algebra. These conformal blocks give a prediction for the instanton partition functions of the 4D N = 1 SCFTs of class Sk. 
Regular Seminar Tommi Tenkanen (QMUL)
at: 14:00 room G.O. Jones 610  abstract: The nature of the unknown nonbaryonic energy density component whose abundance is known to exceed the amount of ordinary, visible matter by a factor of five, that of Dark Matter (DM), is one of the greatest open problems in cosmology. In this talk I will briefly review the evidence and searches for DM, present an overview of candidates including the standard WIMP paradigm, and discuss some recently proposed alternatives for WIMPs and how to test them. 