Here we will keep a list of papers for discussion at the journal club. If you see a paper that seems interesting during the week (up to Wed), just add it to the list and the organizer (Shira) will bring it up during the journal club on Friday. To add a paper, just click on the edit button next to the "Papers discussion" title.

# This Week

## Sept 20 - Jackson Fliss

### Aspects of entanglement in Chern-Simons theory

Topological field theories play a key role in several areas of theoretical physics. Here I will explain ways in which Chern-Simons theory can be a useful playground for exploring entanglement both in topological insulating phases of matter and in gauge theories.

I will begin with a brief review of the Kitaev-Preskill / Levin-Wen “topological entanglement entropy,” what it can detect, and how this relates to the broader problem to defining entanglement in gauge theories. If time and interest persists I will describe a setup for probing the long-range, multi-party entanglement of Chern-Simons theory using link invariants.

Please add some papers for the discussion!

- Reparametrization modes, shadow operators, and quantum chaos in higher-dimensional CFTs (Haehl, Reeves, Rozali)
- Warped Symmetries of the Kerr Black Hole (Aggarwal, Castro, Detournay)
- Universal Spinning Black Holes and Theories of Class R (Bobev, Crichigno)
- Circular quiver gauge theories, isomonodromic deformations and WN fermions on the torus (Bonelli, Del Monte, Gavrylenko, Tanzini)

# JCs of the Recent Past

## Sept 13 - Mert Beşken

### Thermalization and Virasoro symmetry

We will begin with discussion of general aspects of thermalization. In classical mechanics chaos and ergodicity lead to thermal behaviour. We will state the problem in quantum mechanics as the emergence of statistical mechanics from the Schrodinger equation. Eigenstate thermalization hypothesis describes how this can happen and discusses matrix elements of few body operators in high energy eigenstates.

To apply this to 2d conformal field theories we seek to compute matrix elements of local primary operators in high energy descendant states. We introduce an orthonormal basis of states in a Virasoro module dubbed the "oscillator basis" and compute these matrix elements. If time permits we will see how to compute Virasoro conformal blocks using oscillators and prove that these exponentiate in the large central charge limit.

and we discussed

- All Tree-Level Correlators in AdS5×S5 Supergravity: Hidden Ten-Dimensional Conformal Symmetry (Caron-Huot, Trinh)
- ZZ Instantons and the Non-Perturbative Dual of c = 1 String Theory (Balthazar, Rodriguez, Yin)

## Sept 6 - Tarek Anous

### Areas and entropies in BFSS/gravity duality

Abstract: The BFSS matrix model provides an example of gauge-theory / gravity duality where the gauge theory is a model of ordinary quantum mechanics with no spatial subsystems. If there exists a connection between areas and entropies in this model similar to the Ryu-Takayanagi formula, the entropies must be more general than the usual subsystem entanglement entropies. In the journal club, I will give a brief overview of the BFSS/D0 brane geometry duality and describe general features of the extremal surfaces in the bulk. I will then discuss the possible entropic quantities in the matrix model that could be dual to the ‘regulated areas’ *which I will define) of these extremal surfaces.

and we discussed

- The Page curve of Hawking radiation from semiclassical geometry (Almheiri, Mahajan, Maldacena, Zhao)
- Traversable wormholes in AdS and bounds on information transfer (Freivogel, Galante, Nikolakopoulou, Rotundo)
- Superfluids as Higher-form Anomalies (Delacretaz, Hofman, Mathys)

# JCs of the past

This has been restored from the backup of our previous referata website.

Journal Clubs of Spring 2015

Journal Clubs of Fall 2015

Journal Clubs of Spring 2016

Journal Clubs of Fall 2016

Journal Clubs of Spring 2017

Journal Clubs of Fall 2017

Journal Clubs of Spring 2018

Journal Clubs of Fall 2018

Journal Clubs of Spring 2019