Directions

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 15-20 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.

Seminars at Queen Mary University of London

Found at least 20 result(s)

18.01.2018 (Thursday)

Numerical Simulations of Asymptotically AdS Spacetimes

Regular Seminar Hans Bantilan (QMUL)

at:
14:00 QMW
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, heavy-ion 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 non-linear regime of general relativity.

11.01.2018 (Thursday)

Spacetime as a resource

Regular Seminar Joan Simon (U. of Edinburgh)

at:
14:00 QMW
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.

14.12.2017 (Thursday)

Branes and the Kraft-Procesi transition

Regular Seminar Santiago Cabrera Marquez (Imperial College London)

at:
14:00 QMW
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.

08.12.2017 (Friday)

Graduate Mini-course: Holographic combinatorics : 2d Yang Mills theory to tensor models via AdS/CFT

Triangular Seminar Sanjaye Ramgoolam (QMUL)

at:
11:00 QMW
room GO Jones 610
abstract:

These lectures will be focused on aspects of combinatorics relevant to gauge-string duality (holography). The physical theories we will discuss include two dimensional Yang Mills theory, four-dimensional N=4 super Yang Mills theory with U(N) gauge group, Matrix and tensor models. The key mathematical concepts include : Schur Weyl-duality, permutation equivalence classes and associated discrete Fourier transforms as an approach to counting problems and, branched covers and Hurwitz spaces. Schur-Weyl 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 gauge-theory dual to giant gravitons in AdS. In the simplest cases of gauge-string 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.)

01.12.2017 (Friday)

Graduate Mini-course: Holographic combinatorics : 2d Yang Mills theory to tensor models via AdS/CFT

Triangular Seminar Sanjaye Ramgoolam (QMUL)

at:
11:00 QMW
room GO Jones 610
abstract:

These lectures will be focused on aspects of combinatorics relevant to gauge-string duality (holography). The physical theories we will discuss include two dimensional Yang Mills theory, four-dimensional N=4 super Yang Mills theory with U(N) gauge group, Matrix and tensor models. The key mathematical concepts include : Schur Weyl-duality, permutation equivalence classes and associated discrete Fourier transforms as an approach to counting problems and, branched covers and Hurwitz spaces. Schur-Weyl 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 gauge-theory dual to giant gravitons in AdS. In the simplest cases of gauge-string 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. Half-BPS and quarter-BPS. Counting, construction and correlators in group theoretic combinatorics.)

30.11.2017 (Thursday)

Holographic NJL Interactions

Regular Seminar Nick Evans (U. Southampton)

at:
14:00 QMW
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.

24.11.2017 (Friday)

Graduate Mini-course: Holographic combinatorics : 2d Yang Mills theory to tensor models via AdS/CFT

Triangular Seminar Sanjaye Ramgoolam (QMUL)

at:
11:00 QMW
room GO Jones 610
abstract:

These lectures will be focused on aspects of combinatorics relevant to gauge-string 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 Weyl-duality, permutation equivalence classes and associated discrete Fourier transforms as an approach to counting problems and, branched covers and Hurwitz spaces. Schur-Weyl 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 gauge-theory dual to giant gravitons in AdS. In the simplest cases of gauge-string 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 Schur-Weyl duality - relation between representation theory of symmetric groups and unitary groups. Hurwitz spaces and string interpretation of the large N expansion.)

23.11.2017 (Thursday)

Covariant fuzzy spaces, matrix models and higher spin

Regular Seminar Marcus Sperling (Vienna u.)

at:
14:00 QMW
room G O Jones 610
abstract:

In this talk, I will discuss the generalised and basic fuzzy 4-sphere 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) 4-sphere arise as solutions in a Yang-Mills matrix model, such that the fluctuations on the 4-sphere lead to a higher-spin gauge theory.

16.11.2017 (Thursday)

Quantum Gravity from Conformal Field Theory

Regular Seminar James Drummond (U. Southampton)

at:
14:00 QMW
room G O Jones 610
abstract:

I will describe how to recast perturbative quantumgravity using non-perturbative techniques from conformal field theory,focussing on the case of N=4 super Yang-Mills theory. By resolving thedegeneracy among double trace operators at large N we are able to bootstrapone-loop supergravity corrections from the OPE of the CFT.

15.11.2017 (Wednesday)

Polygon Seminar: Dualities in d=2+1 Dimensions

Triangular Seminar David Tong (DAMTP)

at:
15:00 QMW
room GO Jones Lecture Theatre
abstract:

I'll give a basic introduction to particle-vortex duality in d=2+1 dimensions and its relation to 3d bosonization.

14.11.2017 (Tuesday)

Aspects of eta and lambda models and generalised T-duality

Regular Seminar Daniel Thompson (Swansea U.)

at:
16:00 QMW
room G O Jones 610
abstract:

In this talk I shall give a review of two classes of integrable non-linear 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 T-duality. This talk will describe a variety of classical and quantum properties of these theories and their multi-parameter extensions drawing in part on arXiv:1711.00084; arXiv:1706.05322

09.11.2017 (Thursday)

Integrable lattice models in the UV

Regular Seminar Luigi Tizzano (Uppsala U.)

at:
14:00 QMW
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 Chern-Simons 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 Yang-Mills 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.

19.10.2017 (Thursday)

AdS3/CFT_2 and F-Theory

Regular Seminar Christopher Couzens (King's Coll. London)

at:
14:00 QMW
room G O Jones 610
abstract:

In this talk we consider holographic duals of F-theory 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 axio-dilaton. The class of solutions we discuss consist of D3 and 7-brane configurations and naturally fall into the realm of F-theory. 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 F-theory, preserving different amounts of supersymmetry.

05.10.2017 (Thursday)

On self-dual N=4 theories

Regular Seminar Inaki Garcia Etxebarria (MPI Munich)

at:
2:00 QMW
room G.O. Jones 610
abstract:

05.07.2017 (Wednesday)

Holography of BCFT

Regular Seminar Chong-Sun Chu (NCTS, Hsinchu and Taiwan, Natl. Tsing Hua U.)

at:
11:30 QMW
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.

29.06.2017 (Thursday)

Irreversibility of the renormalization group flow in non-unitary quantum field theory

Regular Seminar Benjamin Doyon (KCL)

at:
14:00 QMW
room GO Jones 610
abstract:

The talk is based on a very recent work of the speaker on generalising Zamolodchikov's c-theorem to non-unitary theories.

14.06.2017 (Wednesday)

Scattering Amplitudes, Double Copy and Worldsheet Models of QFTs (Lecture 4)

Informal Seminar Ricardo Monteiro (QMUL)

at:
10:30 QMW
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 two-hour 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 field-theory amplitudes from string-theory-inspired techniques, via a new type of worldsheet model known as ambitwistor string. This leads to an extension of the scattering equations to loop level.

13.06.2017 (Tuesday)

Scattering Amplitudes, Double Copy and Worldsheet Models of QFTs (Lecture 3)

Informal Seminar Ricardo Monteiro (QMUL)

at:
10:30 QMW
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 two-hour 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 field-theory amplitudes from string-theory-inspired techniques, via a new type of worldsheet model known as ambitwistor string. This leads to an extension of the scattering equations to loop level.

07.06.2017 (Wednesday)

Scattering Amplitudes, Double Copy and Worldsheet Models of QFTs (Lecture 2)

Informal Seminar Ricardo Monteiro (QMUL)

at:
10:00 QMW
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 two-hour 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 field-theory amplitudes from string-theory-inspired techniques, via a new type of worldsheet model known as ambitwistor string. This leads to an extension of the scattering equations to loop level.

06.06.2017 (Tuesday)

Scattering Amplitudes, Double Copy and Worldsheet Models of QFTs (Lecture 1)

Informal Seminar Ricardo Monteiro (QMUL)

at:
10:00 QMW
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 two-hour 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 field-theory amplitudes from string-theory-inspired techniques, via a new type of worldsheet model known as ambitwistor string. This leads to an extension of the scattering equations to loop level.