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)
Regular Seminar JeongHyuck Park (Sogang University)
at: 15:30 room 410  abstract: String theory predicts its own gravity rather than GR. In General Relativity the metric is the only geometric and gravitational field, whereas in string theory the closedstring massless sector comprises a skewsymmetric Bfield and the string dilaton in addition to the metric. Furthermore, these three fields transform into each other under Tduality. This hints at a natural augmentation of GR: upon treating the whole closed string massless sector as stringy graviton fields, Double Field Theory may evolve into `Stringy Gravity'. Equipped with an O(D,D) covariant differential geometry beyond Riemann, we spell out the definitions of the stringy Einstein curvature tensor and the stringy EnergyMomentum tensor. Equating them, all the equations of motion of the closed string massless sector are unified into a single expression which we dub the Einstein Double Field Equations. 
Regular Seminar David Berenstein (UC Santa Barbara)
at: 14:00 room G O Jones 610  abstract:

Regular Seminar Matteo Baggioli (Crete U.)
at: 14:00 room G O Jones 610  abstract: A review of the recent progress regarding the holograhic duals for viscoelastic and solid materials. After introducing a simple bottomup model able of realizing such a setup the following physical properties will be discussed: i) the linear elastic features ii) viscoelasticity ii) the nature of phonons and pinning iii) the non linear elastic properties iiii) the convergence properties of the asymptotic expansion. 
Regular Seminar Michal Sedlak (Slovak Academy of Sciences)
at: 14:00 room G O Jones 610  abstract: Any sequence of quantum gates on a set of qubits defines a multipartite unitary transformation. These sequences may correspond to some parts of a quantum computation or they may be used to encode classical/quantum information (e.g. in private quantum channels). If we have only limited access to such a unitary transformation, we may want to store it into a quantum memory and later perfectly retrieve it. Thus, once we cannot use the unitary transformation directly anymore, we could still apply it to any state with the help of the footprint kept in the quantum memory. This can be useful for speeding up some calculations or as an attack for process based quantum key distribution protocol or a communication scheme. We require the storing and retrieving protocol to perfectly reconstruct the unitary transformation, which implies non unit probability of success. We derive optimal probability of success for a ddimensional unitary transformation used Ntimes. The optimal probability of success has a very simple form N/(N1+d^2). This result implies that reliable storing of d^2 parameters of the unknown unitary transformation requires roughly d^2 uses of the transformation. 
Regular Seminar Sunil Mukhi (IISER, Pune)
at: 14:00 room G O Jones 610  abstract: I will summarise old and recent developments on the classification and solution of Rational Conformal Field Theories in 2 dimensions using the method of Modular Differential Equations. Novel and exotic theories are found with small numbers of characters and simple fusion rules, one of these being the Baby Monster CFT. Correlation functions for many of these theories can be computed using crossingsymmetric differential equations. 
Regular Seminar Andrew Tolley (Imperial College London)
at: 14:00 room G O Jones 610  abstract: I will review how the requirements of unitarity, locality, causality and Lorentz invariance impose constraints on the signs of the operator coefficients in an effective field theory, discuss recent work on generalizing these constraints to arbitrary spin particles, and discuss how these can be used to constrain gravitational EFTs of the type considered by cosmologists as models for dark energy or inflation. 
Regular Seminar Yolanda Lozano (Oviedo U.)
at: 14:00 room G O Jones 610  abstract: NonAbelian Tduality, a transformation in String Theory known since the 90’s, has been shown recently to be a powerful solution generating technique in supergravity. In this talk I will discuss various AdS backgrounds generated through this transformation, for which it is possible to give a dual CFT interpretation arising from HananyWitten brane setups. 
Regular Seminar Claude Duhr (Cern)
at: 14:00 room G O Jones 610  abstract: The computation of Feynman integrals is an important ingredient to compute scattering amplitudes to higher orders in perturbative QFT. Over the last couple of years, a lot of progress was made in understanding the mathematics of multiloop Feynman integrals. In particular, it was understood that large classes of integrals evaluate to a class of special functions called multiple polylogarithms, which are an object of active research also in pure mathematics. It is known that starting from two loop, generalisations of polylogarithms to elliptic curves can show up. In this talk we review certain classes of elliptic multiple polylogarithms, and we show that they are closely related to iterated integrals on certain modular curves. 
Regular Seminar Georgios Papathanasiou (DESY)
at: 14:00 room G O Jones 610  abstract: I present recent progress towards determining the planar Smatrix of maximally supersymmetric YangMills theory, thanks to the rich interplay between its perturbative analytic properties in general kinematics, and its integrable structure in special kinematics. The former are related to cluster algebras, and allow for the computation of amplitudes with six/seven gluons up to six/four loops, whereas the latter yields all amplitudes in the multiRegge limit at finite coupling. 
Regular Seminar Ruth Shir (Hebrew University of Jerusalem)
at: 16:00 room G O Jones 610  abstract: Feynman diagrams will be looked at from a new point of view. 'Symmetries of Feynman Integrals' is an analytical method for calculating Feynman diagrams. It is based on exposing an underlying group structure of a given diagram which defines a set of partial differential equations in the parameter space of the diagram. Group orbits in the diagram’s parameter space are used to reduce the Feynman integral into a line integral. The vacuum seagull, a threeloop diagram, and the propagator seagull, a propagatortype diagram with two loops, will be used to demonstrate the method, and to obtain new results. 
Regular Seminar Mariana Grana (IPhT Saclay)
at: 14:00 room G O Jones 610  abstract: TBA 
Regular Seminar Martin Zirnbauer (University of Cologne)
at: 14:00 room G O Jones 610  abstract: The scaling behavior near the transition between plateaus of the integer quantum Hall effect has traditionally been interpreted on the basis of a twoparameter renormalization group flow conjectured from the nonlinear sigma model of Pruisken. Yet, this scaling picture never led to any analytical understanding of the critical point. Here we propose a novel description of the critical point as Pruisken's nonlinear sigma model coupled to a maximally gauged WessZuminoWitten model of level 4. This proposal explains the existing numerical data for the multifractal scaling exponents of critical wavefunctions. 
Regular Seminar Daniel Jafferis (Harvard U.)
at: 14:00 room G O Jones 610  abstract:

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. 