Directions

This institute may be found at Strand in Central London, just north of the Thames (map).

Getting to the Strand Campus:

  • By underground

Temple (District and Circle lines): 2 minute walk. Charing Cross (Bakerloo and Northern lines): 10 minute walk, Embankment (District, Circle and Bakerloo lines): 10 minute walk, Waterloo (Jubilee, Northern, Bakerloo, Waterloo & City lines): 12 minute walk, Holborn (Central and Picadilly lines): 12 minute walk,Chancery Lane (Central line): use exit 4 - 15 minute walk.

  • By train

Charing Cross: 9 minute walk. Waterloo: 12 minute walk. Waterloo East: 10 minute walk. Blackfriars: 12 minute walk.

  • By bus

Buses stopping outside the College: 1, 4, 26, 59, 68, 76, X68, 168, 171, 172, 176(24 hour), 188, 243 (24 hour), 341 (24 hour), 521, RV1.

For more information about public transportations in London, please visit http://www.tfl.gov.uk.

Seminars at King's College London

Found at least 20 result(s)

30.11.2016 (Wednesday)

AdS4 black holes and 3d gauge theories

Regular Seminar Alberto Zaffaroni (Milan Bicocca)

at:
13:15 KCL
room G01 Norfolk Building
abstract:

One of the great success of string theory is the microscopical explanation of the entropy of a class of asymptotically flat black holes. Much less is known about asymptotically AdS black holes in four dimensions or higher. In this talk I explain how to derive the entropy of a class of asymptotically AdS supersymmetric black holes in four dimensions using holography. The counting of black hole micro-states is related to a counting of states in the dual 3d gauge theory which can be explicitly performed using localization.

23.11.2016 (Wednesday)

Non-Wilsonian RG flows and the T barT perturbation of 2D quantum field theories

Regular Seminar Roberto Tateo (University of Turin)

at:
13:15 KCL
room G01 Norfolk Building
abstract:

An interesting link between the effective string theory describing the colour confinement in Yang-Mills theories and conformal field theories perturbed by the composite operator $T \bar{T}$ was recently discovered. We will discuss various aspects of this special kind of integrable perturbation and how it affects the energy levels of a generic 2D Quantum Field Theory, through a surprising relation with the inviscid Burgers equation. As this class of models corresponds to non-Wilsonian RG trajectories, these studies may help to clarify important aspects concerning the appearance of singularities in effective QFT, and hopefully be useful in the effective string framework.

16.11.2016 (Wednesday)

Vertex operator algebras from four-dimensional SCFTs

Regular Seminar Christopher Beem (Oxford University)

at:
13:15 KCL
room G01 Norfolk Building
abstract:

I will review the recently exposed connection between N=2 superconformal field theories in four dimensions and vertex operator algebras (VOAs). I will outline some general features of the VOAs that arise in this manner and describe the manner in which they reflect four-dimensional operations such as gauging and Higgsing. Time permitting, I will also touch on the modular properties of characters of these VOAs.

09.11.2016 (Wednesday)

An algebraic approach to the classification of supergravity backgrounds

Regular Seminar Jose Miguel Figueroa-O'Farrill (Edinburgh)

at:
13:15 KCL
room G01 Norfolk Building
abstract:

I will report on joint work with Andrea Santi outlining an algebraic reformulation of the classification problem of eleven-dimensional supergravity backgrounds. The basic object of study is the Killing superalgebra of the background, whose algebraic structure has recently been elucidated. If time permits I will also comment on work also involving Paul de Medeiros applying these techniques to the construction of rigidly supersymmetric theories in curved spaces.

26.10.2016 (Wednesday)

Supersymmetric Localization on AdS2 x S1

Regular Seminar Rajesh Gupta (King's College London)

at:
13:15 KCL
room G01 Norfolk Building
abstract:

Conformal symmetry relates the metric on AdS_2 x S^1 to that of S^3. This implies that under a suitable choice of boundary conditions for fields on AdS_2 the partition function of conformal field theories on these spaces must agree which makes AdS_2 \times S^1 a good testing ground to study supersymmetric localization on non-compact spaces. We evaluate the partition function of N=2 supersymmetric Chern-Simons theory on AdS_2 x S^1 using localization, where the radius of S^1 is q times that of AdS_2. With boundary conditions on AdS_2 x S^1 which ensure that all the physical fields are normalizable and lie in the space of square integrable wave functions in AdS_2, we find that the result for the partition function precisely agrees with that of the theory on the q-fold covering of S^3.

19.10.2016 (Wednesday)

Comments on the Space of QFTs

Regular Seminar Matthew Buican (Queen Mary University of London)

at:
13:15 KCL
room G01 Norfolk Building
abstract:

In the first part of the talk, I will revisit the question of how to decide whether two 4D N=2 superconformal field theories describe the same physics. Time permitting, I will discuss related questions regarding the classification of 2D rational conformal field theories.

12.10.2016 (Wednesday)

Vortices and Vermas

Regular Seminar Matthew Bullimore (Oxford University)

at:
13:15 KCL
room G01 Norfolk Building
abstract:

In 3d gauge theories, monopole operators create and destroy vortices. I will explore this idea in the context of 3d supersymmetric gauge theories in the presence of an omega background, and explain how it leads to a finite version of the AGT correspondence.

05.10.2016 (Wednesday)

An operator for the zeros of the Riemann zeta function

Regular Seminar Brody Dorje (Imperial College)

at:
13:15 KCL
room G01 Norfolk Building
abstract:

The Riemann hypothesis asserts that the nontrivial zeros of the Riemann zeta function should be of the form 1/2 + i E_n, where the set of numbers {E_n} are real. The so-called Hilbert-Pólya conjecture assumes that {E_n} should correspond to the eigenvalues of an operator that is Hermitian. The discovery of such an operator, if it exists, thus amounts to providing a proof of the Riemann hypothesis. In 1999 Berry and Keating conjectured that such an operator should correspond to a quantisation of the classical Hamiltonian H = xp. Since then, the Berry-Keating conjecture has been investigated intensely in the literature, but its validity has remained elusive up to now. In this talk I will derive a "Hamiltonian" (a differential operator), whose classical counterpart is H = xp, having the property that with a suitable boundary condition on its eigenstates, the eigenvalues {E_n} correspond to the nontrivial zeros of the Riemann zeta function. This Hamiltonian is not Hermitian, but is symmetric under space-time reflection (PT symmetric) in a special way. A formal argument will be given for the construction of the metric operator to define an inner-product space for the eigenstates, and the formally "Hermitian" counterpart Hamiltonian. The talk is based on the work carried out in collaboration with Carl M. Bender (Washington University) and Markus P. Mueller (University of Western Ontario).

07.09.2016 (Wednesday)

Kounterterms in AdS Gravity

Exceptional Seminar Rodrigo Olea Aceituno (UNAB, Chile)

at:
13:15 KCL
room S5.20
abstract:

As an alternative to the Holographic Renormalization procedure in the context of AdS/CFT correspondence, we introduce a regularization scheme for AdS gravity based on the addition of boundary terms which are a given polynomial of the extrinsic and intrinsic curvatures (Kounterterms). These terms are closely related to either topological invariants or Chern-Simons densities in the corresponding dimension, they can be easily generalized to other gravity theories (Einstein-Gauss-Bonnet, Lovelock, etc.). We provide a general prescription on how to obtain standard holographic quantities at the boundary. We also briefly comment on a possible relation to supersymmetry.

29.08.2016 (Monday)

STiL 2016: Supersymmetry, Geometry, and Holography

Exceptional Seminar - - (-)

at:
10:00 KCL
room tba
abstract:

29 August - 3 September, King's College London.

This workshop intends to bring together leading experts and young researchers working on the broad themes of quantum field theory, black holes and gravitation, and holography, so as to share new ideas, calculations, and results in a focused setting.

The topics covered in the workshop include:

  • Symmetries and dualities in field theory and gravity
  • Classical and quantum aspects of black holes
  • Supersymmetric localization and exact results
  • Mathematical aspects of string theory
  • Supergravity solutions and holography
Website

Registration will be closed on 8 July 2016 or when positions are filled.

28.04.2016 (Thursday)

Towards a theory of gravitational radiation

Exceptional Seminar Pawel Nurowski (Centre for Theoretical Physics, Polish Academy of Sciences, Warsaw, Poland)

at:
16:00 KCL
room K2.3, Nash Lecture theatre
abstract:

The recent observation of gravitational waves by LIGO has revived interest in the work on the theory of gravitational radiation done at King's and elsewhere in the 1950's and early 60's. It is well known that after predicting gravitational waves in 1916 Einstein became uncertain about their physical reality. It wasn't until the 1950's and early 60's that their physical status was clarified. Important contributions to the development of the theory of gravitational radiation were made at this time by members of the King's relativity group such as Hermann Bondi, Felix Pirani and Roger Penrose. In 1958 Andrzej Trautman from Leopold Infeld's relativity group in Warsaw delivered a series of highly influential lectures on gravitational radiation at King's. In this talk the work of the Warsaw group, and Trautman in particular, will be discussed and its influence on the development of gravitational wave theory will be explained. Refreshments will be available after the lecture. Please RSVP to: D C Robinson david.c.robinson@kcl.ac.uk

30.03.2016 (Wednesday)

On Killing superalgebras and filtered deformations

Exceptional Seminar Andrea Santi (University of Edinburgh, Marie-Curie INdAM)

at:
13:15 KCL
room K4.31
abstract:

I will present ongoing work with J. Figueroa-O’Farrill and P. de Medeiros on the algebraic structure of Lie superalgebras $g = g_0 \oplus g_1$ generated by Killing spinors. I will explain how any $g$ can be regarded as an appropriate deformation of a subalgebra of the Poincaré superalgebra and discuss applications to the classification of supersymmetric supergravity backgrounds and the geometries admitting rigidly supersymmetric field theories.

23.03.2016 (Wednesday)

Opers and the E6 Minahan-Nemeschansky theory

Regular Seminar Lotte Hollands (Heriot-Watt U., Edinburgh)

at:
13:15 KCL
room K4.31
abstract:

In this seminar I explain a geometric proposal to determine a nonperturbative partition function for the E6 Minahan-Nemeschansky theory. Important ingredients are generating functions of opers, spectral networks and a generalisation of complex Fenchel-Nielsen coordinates to moduli spaces of higher rank flat connections. (This is joint work with Andy Neitzke.)

16.03.2016 (Wednesday)

Prethermalization and thermalization in models with weak integrability breaking

Regular Seminar Fabian Essler (Oxford U.)

at:
13:15 KCL
room K4.31
abstract:

I consider the the effect of weak integrability breaking interactions on the non-equilibrium time evolution in many-particle systems. Using a class of weakly interaction fermion models as an example, I argue that there exists a time window in which the system relaxes locally to a non-equilibrium meta-stable state, before it eventually thermalizes.

16.03.2016 (Wednesday)

AdS_5/CFT_4, N=3

Triangular Seminar George Papadopoulos (King's College London)

at:
15:30 KCL
room WATERLOO G.73
abstract:

Polygon Seminar. NOTE: Seminar is in the room G.73, Franklin-Wilkins, WATERLOO CAMPUS of King's College London. http://www.kcl.ac.uk/campuslife/campuses/waterloo/Waterloo.aspx

09.03.2016 (Wednesday)

AdS Moduli Spaces and Domain Walls

Regular Seminar Hagen Triendl (Imperial College)

at:
13:15 KCL
room K4.31
abstract:

I discuss general properties of supersymmetric Anti-de Sitter (AdS) backgrounds, in particular regarding their moduli spaces and domain walls. I argue that lower-dimensional gauged supergravity is a strong tool to understand supersymmetric AdS backgrounds, independent of the compactification manifold. I show how the moduli space can be determined and explain what this means for the dual conformal field theories. In the last part I comment on supersymmetric domain walls and their dual interpretation as supersymmetric RG- flows.

26.02.2016 (Friday)

S-matrix and conformal bootstrap

Regular Seminar Joao Penedones (EPFL)

at:
14:00 KCL
room S2.29
abstract:

We propose a new strategy to constraint (and perhaps determine) the mass spectrum and the scattering amplitudes of a Quantum Field Theory (QFT). We consider QFT in hyperbolic space and study correlation functions of operators inserted at the conformal boundary. By construction, these observables transform like correlation functions of a lower dimensional Conformal Field Theory. We then apply conformal bootstrap techniques to find universal bounds on the mass spectrum and scattering amplitudes of the QFT. For 1+1 dimensional QFT, we recover the same bounds from a direct S-matrix bootstrap approach.

24.02.2016 (Wednesday)

Higher Spin Black Holes

Regular Seminar Alejandra Castro (Amsterdam U.)

at:
13:15 KCL
room K4.31
abstract:

I'll overview recent progress on non-perturbative aspects of higher spin theories in three dimensions with emphasis on black holes. The two main results I will discuss are: 1) novel properties of extremal and BPS solutions, and 2) how to interpret a higher spin bh as a thermo-field state.

17.02.2016 (Wednesday)

Topological quantum field theory: symmetries and defects

Regular Seminar Nils Carqueville (Schroedinger Inst., Vienna)

at:
13:15 KCL
room K4.31
abstract:

A major paradigm of 20th-century science is to understand nature in the language of quantum field theory. Efforts to answer foundational questions about this language have led to successful and ongoing cross-fertilisation between theoretical physics and pure mathematics. In particular, Atiyah and Segal proposed an axiomisation of the path integral by beautifully linking geometry with algebra. The talk starts with a lightening review of this functorial approach, and then quickly restricts to the case in which spacetime is two-dimensional and has no geometric structure: two-dimensional topological quantum field theory (TQFT). This seemingly simple situation is still surprisingly rich, and we will see how algebras, categories, and "higher" structures appear naturally; examples of such structures are ubiquitous in theoretical physics, string theory, and many areas of mathematics. Once the stage is carefully set, we turn to the central notion of symmetry, which involves the action of groups on a TQFT. We will be led to interpret symmetries as special kinds of "defects" of the TQFT, which in turn allows for a natural, purely algebraic generalisation of orbifolding. This leads to new equivalences between TQFTs, of which we will discuss the examples of Landau-Ginzburg models, and (if time permits) refined knot invariants.

17.02.2016 (Wednesday)

Brane Brick Models, Toric Calabi-Yau 4-folds and 2d (0,2) Quivers

Exceptional Seminar Rak-Kyeong Seong (KIAS)

at:
15:30 KCL
room K6.63
abstract:

In this talk, I will discuss Type IIA brane configurations consisting of D4-branes suspended between NS5-branes which represent a large class of 2d (0,2) quiver gauge theories. We call these new constructions Brane Brick models. These are T-dual to D1-branes over singular toric Calabi-Yau 4-folds and encode information about the probed Calabi-Yau geometry as well as the corresponding GLSM. If time permits, I will present how Brane Brick models naturally realise in terms of a brane configuration 2d (0,2) Gadde-Gukov-Putrov triality.