Holography: triangle meeting

20Apr2018 13:30 - 18:00

Event

Speakers: Brian Willett (KITP, Santa Barbara) and Gui Pimentel (University of Amsterdam). Location: Utrecht. Note the unusual location!

It is our pleasure to announce the Utrecht edition of our Holography@D-ITP meetings this semester. The event will take place in Utrecht on Friday 20 April, 13:30. This event is part of a regular series of meetings sponsored by D-ITP with the objective of bringing together the theoretical physics communities in Amsterdam, Leiden, Utrecht and our sister nodes Groningen, Brussels (ULB and VUB) and Leuven. The topic of this meeting is holography and its applications to different physical systems. We encourage researchers from different areas in theoretical physics to participate!

Programme

13:30 Tea & Coffee

14:00 Brian Willett (KITP, Santa Barbara)

Localization on Seifert Manifolds

15:15 Tea & Coffee

15:45 Gui Pimentel (University of Amsterdam) 

Vacua on the Brink of Decay

17:00 Drinks & Snacks

Abstracts

Brian Willett 

Localization on Seifert Manifolds 

Abstract: I discuss the partition function of three-dimensional supersymmetric gauge theories on a Seifert manifold, i.e., a circle fibration over a Riemann surface. This observable can be computed exactly using the technique of supersymmetric localization. Moreover, it can be constructed by gluing together contributions from local "building blocks" of the three-manifold, exhibiting locality of the quantum field theory. This perspective unifies several known partition functions, including the round and squashed three-sphere, the topological index, and lens space partition functions, as well as introducing an infinite class of new observables. A similar calculation for 4d N=1 theories is also described. Finally, I discuss various applications of these calculations, including new checks of supersymmetric dualities, applications to the fusion algebra of line and surface operators, and holographic tests involving new asymptotically AdS4 supergravity solutions. 

Gui Pimentel  

Vacua on the Brink of Decay 

Abstract: I will describe some universal features of static backgrounds that are on the brink of triggering a quantum instability. The setup is very similar to the ones in which particle production is ubiquitous (black holes, electric fields,...) but the interest here is to study the crossover between the stable and unstable background configurations. 

Location

Lecture Hall Ruppert-Rood in the Marinus Ruppertgebouw, Utrecht.

It is easy to reach from the bus stop, about 100 meters. For the detailed location of the building see the link to GoogleMaps.

Organisers

Diego Hofman (Amsterdam)

Umut Gursoy (Utrecht)

Koenraad Schalm (Leiden) 

Kyriakos Papadodimas (Groningen)

Published by  D-ITP