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)
Informal Seminar David Berman (QMUL)
at: 14:30 room G.O. Jones LG1  abstract: Graduate Lectures: This short course will cover the origin of Mtheory and brane physics with its applications. 
Informal Seminar David Berman (QMUL)
at: 14:30 room G.O. Jones LG1  abstract: Graduate Lectures: This short course will cover the origin of Mtheory and brane physics with its applications. 
Regular Seminar Jan Plefka (Humboldt)
at: 14:00 room G.O. Jones 610  abstract: A central outcome of the recent Higgs discovery is that the Standard Model (SM) appears to be a selfconsistent quantum field theory all the way up to the Planck scale. Moreover, the measured values for the Higgs and top masses have an intriguing consequence for the question of stability of the Higgs vacuum: The SM lies close to the border of absolute electroweak vacuum stability and metastability. However, these celebrated results extrapolate the SM into a region where quantum gravity effects become important. We have therefore computed the quantum gravitational contributions to the standard model effective potential and analyzed their effects on the Higgs vacuum stability in the framework of effective field theory. Nonrenormalizability of Einstein gravity induces higher dimension φ6 and φ8 operators at the one loop level with novel couplings η1/2. We find that the true minimum of the standard model effective potential now lies below the Planck scale for almost the entire parameter space (η1/2(mt) > 0.01). In addition quantum gravity is shown to contribute to the minimal value of the standard model NLO effective potential at the percent level. The quantum gravity induced contributions yield a metastable vacuum for a large fraction of the parameter space in the flowing couplings η1/2. 
Regular Seminar David Berenstein (UCSB)
at: 14:00 room G.O. Jones 610  abstract: Half BPS states (operators) in N=4 SYM are famously described by free fermions both at weak and strong coupling. I describe a set of conjectures for a preferred class of states in more general conformal field theories that can be tested in supergravity for when such a free fermion description might arise and some motivation for it applying generally. The states in question belong to the chiral ring of a supersymmetric conformal field theory that extremize an additional U(1) charge for fixed dimension and can be reduced to multitraces of a composite matrix field, which is equivalent to using Young tableaux (Schur polynomials) as a basis. The main conjecture asserts that if the Young tableaux are orthogonal, then the set of extremal three point functions of traces to order 1/N are determined up to a single constant. The conjecture is extended further by providing an exact norm for the Schur basis and this norm arises from a set of free fermions for a generalized oscillator algebra. 
Regular Seminar Oliver Schlotterer (AEI Potsdam)
at: 14:00 room G.O. Jones 610  abstract: In this talk, I will review basic features of the pure spinor superstring as well as recent progress to compute and compactly represent scattering amplitudes in this framework. A stringinspired organization scheme for amplitudes in both field and stringtheories will be described where the nonlinearities of tendimensional super YangMills theory are encoded in socalled multiparticle superfields. They allow to efficiently capture the polarization dependence through cubic diagrams where the intuitive mapping as well as the composition rules for amplitudes are guided by BRST invariance. 
Regular Seminar Carlos Nunez (Swansea U.)
at: 16:00 room G.O. Jones 610  abstract: I will discuss recent developments in the duality between gauge fields and strings. 
Regular Seminar Robert de Mello Koch (Witwatersrand U.)
at: 14:00 room G.O. Jones 610  abstract: In this talk we will discuss the collective field theory approach towards understanding the holographic duality between Vasiliev's minimal higher spin theory in AdS4 and the free O(N) vector model in 2+1 dimensions. 
Regular Seminar Toby Wiseman (Imperial College)
at: 15:15 room G.O. Jones 610  abstract: I will review the link between 1+p dimensional maximally supersymmetric YangMills and the black hole thermodynamics of Dpbranes via the gauge/string correspondence. The finite temperature behaviour of Dpbrane supergravity black holes looks very alien from the perspective of the dual strongly coupled YangMills. However, I will argue that in a natural set of YangMills variables, the classical moduli (which unfortunately are still strongly coupled), certain features of these thermodynamics become quite transparent. 
Regular Seminar Sameer Murthy (King's)
at: 14:00 room G.O. Jones 610  abstract: I will discuss the exact quantum entropy of supersymmetric black holes as a gravitational functional integral in AdS2. In theories with eight supercharges, a computation of the exact entropy is possible using supersymmetric localization. I will discuss this technique, and describe the computation of functional determinants that can be computed using index theorems. I will then compare the exact gravitational formula to microscopic formulas coming from string theory. 
Exceptional Seminar Samir Mathur (Ohio State)
at: 15:00 room G.O. Jones Lecture Theatre  abstract: The BekensteinHawking formula for the entropy of a black hole suggests that entropy in strong gravity situations should be proportional to bounding area rather than enclosed volume. But we argue that the S and T dualities of string theory suggest an entropy formula that is extensive in the volume, with the area formula appearing as a special case. In particular we find a set of states in string theory that violate the covariant entropy bound, which seeks to extend the area entropy formula to situations like the early Universe. 
Regular Seminar Bobby Acharya (King's)
at: 14:00 room G.O. Jones 610  abstract: By studying the cosmological dynamics of the moduli and axion fields we develop a set of "generic predictions" of solutions to string/M theory which have low energy supersymmetry breaking and grand unification. The nature of dark matter plays an important role in much of the discussion. 
Triangular Seminar YangHui He (City University)
at: 15:30 room Francis Bancroft 1.15  abstract:

Regular Seminar Daniel Litim (Sussex U.)
at: 14:00 room G.O. Jones 610  abstract: It is commonly believed that for a quantum field theory to be fundamental, its highenergy behaviour must be governed by an ultraviolet (UV) fixed point. A very satisfying example is given by asymptotic freedom of QCD where the UV fixed point is noninteracting. In this talk, I discuss the existence of interacting UV fixed points in various quantum field theories, in particular in four dimensions, both with and without gravity. Implications for particle physics are also evaluated. 
Regular Seminar Matthias Wilhelm (Humboldt)
at: 16:00 room G.O. Jones 610  abstract: We study the form factor of a generic gaugeinvariant local composite operator in N=4 SYM theory. At treelevel and for a minimal number of external fields, the form factor exactly realises the spinchain picture of N=4 SYM theory in the language of scattering amplitudes. Via generalised unitarity, we obtain the cutconstructible part of the oneloop correction to the minimal form factor of a generic operator. Its UV divergence yields the complete oneloop dilatation operator of the theory. We also compute the complete twoloop correction to the twopoint form factor of the Konishi operator via unitarity and obtain the twoloop Konishi anomalous dimensions from it. For the Konishi operator as well as other nonprotected operators, important subtleties arise which require an extension of the method of unitarity. Moreover, since the inclusion of nonprotected operators into the action renders it formally nonsupersymmetric, the form factors of these operators share many features with quantities in QCD, such as the occurrence of rational terms. The talk is based on the recent works 1410.6309 and 1410.8485. 
Regular Seminar Frank Ferrari (Brussels U.)
at: 14:00 room G.O. Jones 610  abstract: In many instances of holographic correspondences between a d dimensional boundary theory and a d+1 dimensional bulk, a simple argument in the boundary theory implies that there must exist a direct relation between the onshell Euclidean gravitational bulk action and the onshell Euclidean action of a (d1)brane probing the bulk geometry. This relation is crucial for the consistency of holography but puzzling from the bulk perspective. We provide a full bulk derivation in the case of pure gravity. A central role is played by a nontrivial isoperimetric inequality that must be satisfied in a large class of PoincaréEinstein spaces. Remarkably, this inequality follows from a theorem by John Lee. 
Regular Seminar Michael Ferlaino (Swansea)
at: 14:00 room G.O. Jones 610  abstract: Within the context of the duality between higher spin gravitational theories and a semi classical limit of WN minimal models, we consider 2D CFTs with W1 symmetry at nite temperature, deformed by the presence of a chemical potential for the spin{three current. As a perturbative expansion in the chemical potential, we compute the Renyi and entanglement entropies for a single interval. The leading correction is universal and matches the holographic result, based on Wilson line functionals, obtained from the higher spin gravitational dual. 
Regular Seminar Zvi Bern (UCLA)
at: 16:00 room G.O. Jones 610  abstract:

Regular Seminar Fabrizio Nieri (Surrey)
at: 16:00 room G.O. Jones 610  abstract: In recent years, due to the method of supersymmetric localization, many exact results have been achieved in the study of supersymmetric gauge theories on compact spaces of various dimension and topology, leading to the discovery of surpraising structures. An important example is provided by the correspondence introduced by Alday, Gaiotto and Tachikawa, relating the partition functions of a large class of supersymmetric gauge theories on S4 and S2 to correlators in Liouville CFT. In this talk, I will explain how this picture can be lifted to higher dimensional gauge theories via the correspondence of partition functions on S5, S4xS1, S3 and S2xS1 to correlators in theories whose underlying symmetry is given by a quantum deformation of the Virasoro algebra. In particular, I will discuss how 3point functions can be derived by the bootstrap approach and used to define this novel class of qdeformed CFTs. I will also discuss some aspects related to integrable structures in these models, such as reflection coefficients, as well as possible generalisation. 
Informal Seminar Brian Wecht (QMUL)
at: 11:00 room G.O. Jones 610  abstract: In this series of 45 2hour lectures, I'll describe some of the powerful exact results that one can achieve in supersymmetric theories. The topics will be as follows: Lecture 1: NonRenormalization Theorems Lecture 2: Classical and Quantum Moduli Spaces Lecture 3: Superconformal Field Theories and Seiberg Duality Lecture 4: Central Charges, amaximization, and the atheorem Lecture 5 (if it happens): Brane Tilings and Dimers 