Holography and Dualities 2016: New Advances in String and Gauge Theory
from
Wednesday, 30 March 2016 (09:00)
to
Friday, 22 April 2016 (18:00)
Monday, 28 March 2016
Tuesday, 29 March 2016
Wednesday, 30 March 2016
Thursday, 31 March 2016
10:15
Butterflies and constraints on holography (NORDITA SEMINAR)

Pawel Caputa
(Nordita)
Butterflies and constraints on holography (NORDITA SEMINAR)
Pawel Caputa
(Nordita)
10:15  11:15
Room: 122:026
I will discuss some recent attempts to formulate necessary conditions for holography based on entanglement, scrambling and the butterfly effect.
Friday, 1 April 2016
10:15
Analytic anisotropic solution for holography

Jie Ren
(Hebrew University)
Analytic anisotropic solution for holography
Jie Ren
(Hebrew University)
10:15  11:15
Room: 122:026
An exact solution to Einstein's equations for holographic models is presented and studied. The IR geometry has a timelike cousin of the Kasner singularity, which is the less generic case of the BKL (BelinskiKhalatnikovLifshitz) singularity, and the UV is asymptotically AdS. This solution describes a holographic RG flow between them. The solution's appearance is an interpolation between the planar AdS black hole and the AdS soliton. The causality constraint is always satisfied. The boundary condition for the currentcurrent correlation function and the Laplacian in the IR is examined in detail. There is no infalling wave in the IR, but instead, there is a normalizable solution in the IR. In a special case, a hyperscalingviolating geometry is obtained after a dimension reduction.
15:00
Introduction to the program (NORDITA SEMINAR): N=4 SYM as a theorist's Valhalla

Nadav Drukker
(King's College)
Introduction to the program (NORDITA SEMINAR): N=4 SYM as a theorist's Valhalla
Nadav Drukker
(King's College)
15:00  16:00
Room: 132:028
Maximally supersymmetric YangMills theory in 4 dimensions (N=4 SYM) is a remarkable theory that can be studied in a variety of ways beyond traditional perturbation theory. On our quest to calculate the quarkantiquark potential in this theory we will be led by three valkyries: Holography, Integrability and Localization. They pull us in three different directions, towards string theory, matrix models and spin chains, but together enable us to calculate some quantities exactly and others to very high precision.
Saturday, 2 April 2016
Sunday, 3 April 2016
Monday, 4 April 2016
10:15
Analytic bootstrap program

Fernando Alday
(Oxford)
Analytic bootstrap program
Fernando Alday
(Oxford)
10:15  11:15
Room: AlbaNova, FA32
We will use basic properties of conformal field theories, such as symmetries and the structure of the operator product expansion, to get analytic results for the scaling dimensions of higher spin operators.
15:15
Perturbative worldsheet calculations in AdS_2 and AdS_3

Linus Wulff
(Imperial College)
Perturbative worldsheet calculations in AdS_2 and AdS_3
Linus Wulff
(Imperial College)
15:15  16:15
Room: AlbaNova, FA32
I will describe perturbative worldsheet calculations for strings in AdS_d x S^d x T^{102d} for d=2,3. These include the oneloop BMN Smatrix and the twoloop correction to the dispersion relation. I will discuss the subtle regularization issues that arise and the comparison to conjectured exact expressions when those are available.
17:30
Reception
Reception
17:30  19:00
Room: 132:028
Tuesday, 5 April 2016
10:15
Supersymmetric 5D gauge theories on toric manifolds

Maxim Zabzine
(Uppsala)
Supersymmetric 5D gauge theories on toric manifolds
Maxim Zabzine
(Uppsala)
10:15  11:15
Room: AlbaNova, FA32
I will review the localization calculation for 5D supersymmetric gauge theories on the toric SasakiEinstein manifold. I will explain briefly how the answer is written in terms of toric data. The factorisation properties of the answer will be discussed and the relation to Nekrasov’s partition function will be explained. At the end I will discuss the modular properties of the partition function for the abelian example. If time allows I will make some comments on 6D and 7D calculations.
15:15
Demystifying the Holographic Mystique

Dmitri Khveshchenko
(North Carolina)
Demystifying the Holographic Mystique
Dmitri Khveshchenko
(North Carolina)
15:15  16:15
Room: AlbaNova, FA32
In spite of many interesting developments, the overall progress towards a systematic study and classification of various 'strange' metallic states of matter has so far been rather slow. To that end, it was argued that a recent proliferation of the ideas of holographic correspondence originating from string theory might offer a possible way out of the stalemate. However, despite a flurry of recent applications of the broadly defined holographic conjecture to a variety of condensed matter problems, the validity of this intriguing approach remains anything but firmly established. This discussion aims at ascertaining its true status and elucidating the conditions under which its predictions may indeed be right (albeit, possibly, for a wrong reason).
Wednesday, 6 April 2016
10:15
Anomalous dimension of giant gravitons from nonabelian DBI and Spin Matrix theory

Troels Harmark
(NBI)
Anomalous dimension of giant gravitons from nonabelian DBI and Spin Matrix theory
Troels Harmark
(NBI)
10:15  11:15
Room: AlbaNova, FB53
In this talk we begin by introducing Spin Matrix theory (SMT). It can be seen as a finiteN generalization of a nearest neighbor spin chain. SMT describes N=4 SYM near certain unitarity bounds and zerotemperature critical points. We find a new tractable regime at finite N described by a classical matrix model. Next we go to the string side of the AdS/CFT correspondence and explain that the dual is given by highly excited giant gravitons. Finally, we match the matrix model to interacting giant gravitons on AdS using the nonabelian DBI action.
15:15
Confronting exact results from localization and holography

Dario Martelli
(King's College)
Confronting exact results from localization and holography
Dario Martelli
(King's College)
15:15  16:15
Room: AlbaNova, FB52
Thursday, 7 April 2016
10:15
Smooth Wilson loops in N=4 Superspace and Yangian Symmetry

Jan Plefka
(Humboldt)
Smooth Wilson loops in N=4 Superspace and Yangian Symmetry
Jan Plefka
(Humboldt)
10:15  11:15
Room: AlbaNova, FA32
We will review the construction of smooth MaldacenaWilson super Loops in nonchiral onshell N=4 superspace and discuss its superconformal and Yangian symmetries.
13:15
Double Field Theory: an Overview

Chris Hull
(Imperial College)
Double Field Theory: an Overview
Chris Hull
(Imperial College)
13:15  14:15
Room: AlbaNova, FB42
Friday, 8 April 2016
10:15
Poles in threepoint functions

Joe Minahan
(Uppsala)
Poles in threepoint functions
Joe Minahan
(Uppsala)
10:15  11:15
Room: AlbaNova, FA32
15:15
Onepoint functions in AdS/dCFT

Marius de Leeuw
(NBI)
Onepoint functions in AdS/dCFT
Marius de Leeuw
(NBI)
15:15  16:15
Room: AlbaNova, FA32
In this talk I will discuss onepoint functions in the defect conformal field theory dual to a D3D5 brane system with k units of world volume flux. In such a setup scalar operators pick up a nontrivial vacuum expectation value. I will discuss how one can use integrability to compute these onepoint functions for unprotected operators by expressing them as overlaps between Bethe eigenstates and a matrix product state. I will present a closed expression of determinant form for these onepoint functions valid for any value of k. In particular, by using the transfer matrix of the Heisenberg spin chain, one can recursively relate the matrix product state for higher even and odd k to the matrix product state for k = 2 and k = 3. Furthermore, there is evidence that the matrix product states for k = 2 and k = 3 are related via a ratio of Baxter’s Qoperators.
19:00
Program Dinner
Program Dinner
19:00  21:30
Room: Hasselbacken, Hazeliusbacken 20
Saturday, 9 April 2016
Sunday, 10 April 2016
Monday, 11 April 2016
10:15
Deformations of AdS backgrounds: an overview

Radu Roiban
(Penn State)
Deformations of AdS backgrounds: an overview
Radu Roiban
(Penn State)
10:15  11:15
Room: AlbaNova, FB53
After recalling the beta and gamma deformations, we review briefly from a worldsheet perspective the lambda deformation and the general YangBaxtertype deformations. Focusing on the eta deformation, we discuss its worldsheet and target space properties. While this sigma model does not appear to define a critical string theory in the usual sense; we review the modified IIB equations of motion that the corresponding field configuration satisfies and their possible relation to the worldsheet theory.
15:15
The N=2 superconformal bootstrap

Pedro Liendo
(Humboldt)
The N=2 superconformal bootstrap
Pedro Liendo
(Humboldt)
15:15  16:15
Room: AlbaNova, FB53
In this talk we will present an overview of the N=2 superconformal bootstrap program. We will introduce a protected subsector present in any 4d N=2 SCFT whose correlation functions are captured by a twodimensional chiral algebra. Thanks to a subtle interplay between 4d and 2d quantities, it is possible to obtain analytic constraints that severely reduce the space of theories. Once an overall picture of the landscape is obtained, one can then use modern numerical techniques and attempt to solve individual theories numerically.
17:30
Reception
Reception
17:30  19:00
Room: 132:028
Tuesday, 12 April 2016
10:15
Overview of higherspin holography

SooJong Rey
(Seoul National University)
Overview of higherspin holography
SooJong Rey
(Seoul National University)
10:15  11:15
Room: AlbaNova, FB53
Wednesday, 13 April 2016
10:15
Holographic 2+1D Weyl Semimetals

Gordon Semenoff
(UBC)
Holographic 2+1D Weyl Semimetals
Gordon Semenoff
(UBC)
10:15  11:15
Room: AlbaNova, FR4
15:15
Quarkantiquark potential in N=4 SYM

Nikolay Gromov
(King's College)
Quarkantiquark potential in N=4 SYM
Nikolay Gromov
(King's College)
15:15  16:15
Room: AlbaNova, FR4
We construct a closed system of equations describing the quarkantiquark potential at any coupling in planar N=4 supersymmetric YangMills theory. It is based on the Quantum Spectral Curve method supplemented with a novel type of asymptotics. A pedagogical introduction to the Quantum Spectral Curve method will be given. We also discuss how this method can be used at weak coupling and numerically for any coupling with extremely high precision. based on 1601.05679 and 1510.02098
Thursday, 14 April 2016
10:15
N=2 gauge theories and geometric representation theory

Richard Szabo
(HeriotWatt)
N=2 gauge theories and geometric representation theory
Richard Szabo
(HeriotWatt)
10:15  11:15
Room: AlbaNova, FB53
15:15
AdS3/CFT2 and integrability

Riccardo Borsato
(Imperial College)
AdS3/CFT2 and integrability
Riccardo Borsato
(Imperial College)
15:15  16:15
Room: AlbaNova, FB53
Friday, 15 April 2016
10:15
Lattice N=4 SuperYangMills and Sduality

Joel Giedt
(Rensselaer Polytechnic Institute)
Lattice N=4 SuperYangMills and Sduality
Joel Giedt
(Rensselaer Polytechnic Institute)
10:15  11:15
Room: AlbaNova, FD5
Formulations of lattice supersymmetry over the last decade have been able to significantly reduce the amount of finetuning necessary in order to obtain the correct continuum limit. In the case of N=4 superYangMills, the approach that has emerged as the best path forward is based on a topological twisting of the theory. We describe this lattice theory and the various studies we have performed in order to understand its renormalization. A discrete subgroup of the Rsymmetry has been used to identify the supersymmetric continuum limit, and we have performed nonpertubative numerical tests of it. In terms of applications, Montonen and Olive found evidence that a duality could exist in YangMills with adjoint scalars. In this scheme, the 't HooftPolyakov monopole is dual to the W boson, leading to a theory equivalent to the GeorgiGlashow model but with magnetic charge replacing electric charge. The duality is believed to be realized in N=4 superYangMills. We are pursuing numerical, nonperturbative evidence for this Sduality using our lattice formulation. The various tricks that are necessary for doing this will be described.
19:00
Program Dinner
Program Dinner
19:00  21:30
Room: Ulla Winbladh, Rosendalsvägen 8
Saturday, 16 April 2016
Sunday, 17 April 2016
Monday, 18 April 2016
10:15
AdS/CFT and Higher spin scattering in flat space

Arkady Tseytlin
(Imperial College)
AdS/CFT and Higher spin scattering in flat space
Arkady Tseytlin
(Imperial College)
10:15  11:15
Room: 122:026
14:15
Nonrelativistic conformal bootstrap

Piotr Surowka
(MPI, Munich)
Nonrelativistic conformal bootstrap
Piotr Surowka
(MPI, Munich)
14:15  15:15
Room: 122:026
17:30
Reception
Reception
17:30  19:00
Room: 132:028
Tuesday, 19 April 2016
10:15
Nonrelativistic geometry in nonAdS holographic dualities

Niels Obers
(NBI)
Nonrelativistic geometry in nonAdS holographic dualities
Niels Obers
(NBI)
10:15  11:15
Room: FB:54
NewtonCartan geometry was introduced more than 90 years ago in order to find a geometric formulation of Newtonian gravity. I recent years, this geometry (including a novel generalisation that includes torsion) has made its appearance in holography for systems with nonrelativistic symmetry and been studied in parallel directly in a nonrelativistic field theory context. I will give an introduction to NewtonCartan (NC) geometry and its torsional version (TNC), and show how this appears as a boundary geometry in the context of holography for bulk Lifshitz spacetimes. The coupling of field theories to TNC geometry will be discussed and I will exhibit how dynamical NC geometry leads to a covariant formulation of the known versions of HoravaLifshitz gravity. The latter may also be used as bulk theories in a holographic context, which will be illustrated via a novel formulation of 3D Horava Lifsthiz gravity, providing a new way to implement a non relativistic gravity/field theory correspondence. Finally, I will outline a connection with flat space holography, which features Carollian geometry on the boundary. To conclude, I will summarize some open problems and mention progress in related directions.
14:15
Scaling Laws in Quantum Quench : Holography and Field Theory

Sumit Das
(Kentucky)
Scaling Laws in Quantum Quench : Holography and Field Theory
Sumit Das
(Kentucky)
14:15  15:15
Room: FB54
Wednesday, 20 April 2016
10:15
Diagrams and Algebras as Holograms

Sanjaye Ramgoolam
(Queen Mary)
Diagrams and Algebras as Holograms
Sanjaye Ramgoolam
(Queen Mary)
10:15  11:15
Room: FA32
15:15
Flat space quarkantiquark potential from the Quantum Spectral Curve

Fedor LevkovichMaslyuk
(King's College)
Flat space quarkantiquark potential from the Quantum Spectral Curve
Fedor LevkovichMaslyuk
(King's College)
15:15  16:15
Room: FA32
We apply the integrabilitybased Quantum Spectral Curve framework to study the exact quarkantiquark potential in planar N=4 supersymmetric YangMills theory. We focus on the singular limit corresponding to the flat space potential. We present weak coupling results to 7 loops and a numerical solution in a wide range of the coupling. We also show that in a special limit the QSC reduces to a Schrodinger equation resumming ladder diagrams to all perturbative orders.
Thursday, 21 April 2016
10:15
Twisting new integrable QFT's out of N=4 SYM

Vladimir Kazakov
(ENS)
Twisting new integrable QFT's out of N=4 SYM
Vladimir Kazakov
(ENS)
10:15  11:15
Room: FB42
Friday, 22 April 2016