##### Workshop

#### New Developments in AdS3/CFT2 Holography

**Mar 20, 2017 - May 12, 2017**

**Abstract**

Two of the key problems of modern theories of fundamental interactions are the under-standing of strongly coupled gauge theories and quantum gravity. Holographic duality, through the celebrated work of Maldacena, connects these two seemingly very different problems; it does so via a strong/weak correspondence, making it possible to infer the behavior of strongly coupled gauge theory from a weakly coupled theory of gravity and vice versa. This striking conjecture has fundamentally reshaped the way we think of gauge and gravity theories in the quantum regime.

A quantitative description of gauge/string duals with little or no supersymmetry would likely lead to a much better understanding of strongly coupled phenomena such as confinement or black-hole entropy, making their study an important goal of the community. However, a quantitative framework of generic dualities remains very ambitious. Instead, it may be useful to identify examples which have interesting dynamical behaviour that also retain some simplifying features that allow for a quantitative analysis.

The AdS3 /CFT2 duality is an ideal toy-model for such investigations. Since it has a relatively small amount of supersymmetry (half of the maximally supersymmetric AdS5 /CFT4 example) it allows for a rich dynamics. At the same time, AdS3 /CFT2 plays an important role in a variety of diverse problems in theoretical physics including the strong-coupling dynamics of two-dimensional gauge theories, dynamics of three-dimensional black-holes, quantum instanton moduli space of four-dimensional gauge theory, microscopic entropy counting in five-dimensional black-holes, higher-spin spin symmetries and integrable models, to name but a few. As a result, there are a number of approaches to understanding this duality, each with its own set of tools.

The principal aims of this workshop are:

1. To review recent progress in AdS3 /CFT2.

2. To assemble a critical mass of leading international researchers in order to stimulate collaboration and inspire new developments.

3. To contribute to the research training of young researchers in Italy, Europe and world-wide.

Applications for the workshop and the school closed on October 31. Should you wish to submit a late application, please contact the organisers at ggiworkshop17@gmail.com

**Topics**

- Gauge linear sigma models

- Two-dimensional conformal field theories

- Black holes

- Four-dimensional instantons

- Higher-spin symmetries

- Integrability

**Organizers**

Jan de Boer, Amsterdam U. (Netherlands), Riccardo Borsato, NORDITA (Sweden), Matthias Gaberdiel, ETH Zurich (Switzerland), Olof Ohlsson Sax, NORDITA (Sweden), Alessandro Sfondrini, ETH Zurich (Switzerland),Bogdan Stefanski, jr., London City U. (UK), David Tong, Cambridge U. (UK), Alessandro Torrielli, Surrey U. (UK)

**Local organizer**

cotrone@fi.infn.it

**Contact**

ggiworkshop17@gmail.com

**Related events**

Classical and quantum aspects of the AdS3/CFT2 correspondence (Conference) - May 02, 2017

Recent developments in AdS3 black-hole physics (Focus Week) - Apr 10, 2017

AdS3: theory and practice (School) - Mar 27, 2017

**Talks**

Oct 21, 2019 - 22:42 | Efrat Gerchkovitz | to be announced | Seminar | |||||

Mar 20, 2017 - 11:00 | Sumit Das | Entanglement Scaling in Quantum Quenches | Seminar | |||||

Mar 21, 2017 - 11:00 | Per Kraus | Into the bulk with conformal blocks | Seminar | |||||

Mar 23, 2017 - 11:00 | Chris Hull | Strings, fields and geometry | Seminar | |||||

Mar 23, 2017 - 14:30 | David Tong | On Particle-Vortex Duality | Seminar | |||||

Mar 23, 2017 - 16:00 | Massimo Bianchi | On micro-state geometries of 4-d black-holes and their stringy origin | Seminar | |||||

Mar 24, 2017 - 11:00 | Takuya Okuda | Supersymmetric vortex defects in two dimensions | Seminar | |||||

Apr 03, 2017 - 11:00 | Shlomo Razamat | 2d dualities from 3d dualities | Seminar | |||||

Apr 04, 2017 - 10:15 | Efrat Gerchkovitz | to be announced | Seminar | |||||

Apr 04, 2017 - 11:30 | Eva Llabres & Charlotte Sleight | Spinning (geodesic) Witten diagrams | Seminar | |||||

Apr 07, 2017 - 10:15 | Ida Zadeh | to be announced | Seminar | |||||

Apr 07, 2017 - 11:30 | Romuald Janik | Gluing and wrapping: from the Octagon to the SFT vertex | Seminar | |||||

Apr 19, 2017 - 11:00 | Antal Jevicki | Solving the SYK Model | Seminar | |||||

Apr 20, 2017 - 11:00 | Daniel Grumiller | Soft Heisenberg hair on AdS3 | Seminar | |||||

Apr 20, 2017 - 14:30 | George Jorjadze | SL(2,R) string in light-cone gauge | Seminar | |||||

Apr 21, 2017 - 11:00 | Bo Sundbord | Profiles of stringy and higher spin black holes | Seminar | |||||

Apr 26, 2017 - 11:00 | Sergey Frolov | Free field representation of the Zamolodchikov-Faddeev algebra and form factors of the SU(N) x SU(N) Principal Chiral Field model | Seminar | |||||

Apr 27, 2017 - 11:00 | Cheng Peng | Vector models and generalized SYK models | Seminar | |||||

Apr 27, 2017 - 14:30 | Joris Raeyemaekers | Multi-centered AdS3 solutions: from conformal blocks to W-branes | Seminar | |||||

Apr 28, 2017 - 14:00 | Ben Hoare | 3d kappa-Poincare R-matrix and scattering in 3 dimensions | Seminar | |||||

Apr 28, 2017 - 15:15 | Marius de Leeuw | One-point functions in AdS/CFT | Seminar | |||||

May 08, 2017 - 11:00 | Alexandre Belin | Universality of Sparse d>2 Conformal Field Theory at Large N | Seminar | |||||

May 09, 2017 - 11:00 | Yunfeng Jiang | Integrable defects and entanglement entropy | Seminar | |||||

May 10, 2017 - 11:00 | Sanjaye Ramgoolam | Combinatorics and geometry of primary fields in free four dimensional CFTs | Seminar | |||||

May 11, 2017 - 11:00 | Danilo Diaz | On holographic Weyl anomalies and Rényi entropy coefficients | Seminar | |||||

May 12, 2017 - 11:00 | Yuji Satoh | A world-sheet approach to T-folds | Seminar |