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Location: Amsterdam. Speakers: John McGreevy (UCSD) and Sung-Sik Lee (McMaster/Perimeter).

Event details of Quantum and Topological Matter meeting
Date 29 March 2019
Time 13:00 -18:00

It is our pleasure to announce a special edition of the Amsterdam Delta ITP meeting this semester. In this occasion we will be holding a joint event  for both the Quantum and Topological Matter series and the Holography series of meetings. This way we hope to boost interactions between the Condensed Matter and High Energy Theory communities in all of the D-ITP consortium. This event should provide a nice excuse to bring a large number of researchers with different backgrounds together. 

In order to appeal broadly to both communities we are very happy to have a fun line-up of speakers. We will have two external speakers that have moved seamlessly throughout their careers between both communities attacking important problems in both areas.

John McGreevy (UCSD) is a String Theorist by upbringing who has worked on applications of Holography towards the understanding of Condensed Matter systems and is now pursuing pure Condensed Matter research in topics ranging from quantum chaos to topological phases and strange metals.

Sung-Sik Lee (McMaster / Perimeter) is a Condensed Matter theorist who has worked on diverse topics including the coupling of fermi surfaces to critical bosons, the 1/N expansion and the quantum renormalization group and has made important contributions to the field of holography and the emergence of gravity and geometry from strongly coupled quantum systems. 

We very much hope that their talks will inspire both communities to start discussions on topics of mutual interest.


13:30 - 14:00 Tea & Coffee

14:00 - 15:15  John McGreevy (UCSD)A 3d Ising model with a weakly-coupled string dual?

15:15 - 15:45 Coffee break.

15:45 - 17:00 Sung-Sik Lee (McMaster/Perimeter) - State dependent spread of entanglement in relatively local Hamiltonians

17:00 - end Borrel (drinks and snacks), at Polder (Polderzaal), 


John McGreevy (UCSD) - A 3d Ising model with a weakly-coupled string dual?

Abstract: I'll give a new motivation for a string theory description of the critical behavior of the 3d Ising model. Then I'll modify the Ising model so that the string theory is under better theoretical control, and describe the effects of this modification on the phase diagram. I'll conclude with comments about the worldsheet theory. Based on work in progress with Nabil Iqbal.

Sung-Sik Lee (McMaster/Perimeter) - State dependent spread of entanglement in relatively local Hamiltonians

Abstract: In this talk, I will present a background independent non-local Hamiltonians from which local theories emerge within a set of short-range entangled states. The dimension, topology and geometry of the emergent local theory is determined by the initial state to which the Hamiltonian is applied. In this relatively local Hamiltonian, the coordinate speeds at which entanglement spreads and local disturbance propagates in space strongly depend on state.


Room C0.110,  Science Park 904, Amsterdam.


Diego Hofman (Amsterdam)

Umut Gursoy (Utrecht)

Koenraad Schalm (Leiden)

Vladimir Gritsev (Amsterdam)

Vadim Cheianov (Leiden)  

Lars Fritz (UU) 

Cristiane de Morais Smith (UU) 

Dirk Schuricht (UU)


This event is part of a regular series of meetings sponsored by Delta ITP with the objective of bringing together the theoretical physics communities in Amsterdam, Leiden, Utrecht.