Journal clubs until the end of the year

• on Friday, November 29th at 14h15, Piotr Tourkine will present  "Kerr Black Holes as Elementary Particles" by Nima Arkani-Hamed, Yu-tin Huang, Donal O'Connell https://arxiv.org/abs/1906.10100
• on Friday,  November 15th Yixuan Li  and  Severin Lüst will discuss the main swampland conjectures, as follows:
  
  - In the first part, Yixuan will give a short presentation of the panel of the different swampland conjectures (centering on the Weak Gravity Conjecture and the Distance Conjecture) that have been stated, and some links between them, using sections 2,3,4 of   Eran Palti's review
  
  
  
  https://arxiv.org/abs/1903.06239
  
  
  
  - In the second half, Severin will present the paper by Grimm, Palti, and Valenzuela,
  
  
  
  http://arxiv.org/abs/arXiv:1802.08264
  
  
  
  which discusses a string theory test of the infinite distance conjecture. A summary of this paper can also be found in section 4.7.1 of Palti's review.

New academic year for the journal club!

Dear all, this academic year's journal club will kick off on October 10th, as follows

• on Thursday, Oct. 10th, Eva Llabres will present "Charged quantum fields in AdS_2" by Dionysios Anninos, Diego Hofman and Jorrit Kruthoff https://arxiv.org/pdf/1906.00924.pdf
  
  Note unusual date and room: Salle de Conférence Jean Lascoux (Aile0)
  
  
• on Friday, Oct. 25th, Laura Donnay and Andrea Puhm will review the latest developments in flat space holography as follows:
  
  - Laura will review asymptotic symmetries and connection to soft theorems (based on https://arxiv.org/abs/0909.2617 https://arxiv.org/abs/1407.3789 https://arxiv.org/abs/1609.00282 https://arxiv.org/abs/1905.09809)
  
  - Andrea will discuss the relation between amplitudes, celestial correlators and OPEs (https://arxiv.org/abs/1903.01676 https://arxiv.org/abs/1906.10149 https://arxiv.org/abs/1910.07424)

Other papers that are up for discussion are:

• "Kerr Black Holes as Elementary Particles" by Nima Arkani-Hamed, Yu-tin Huang and Donal O'Connell https://arxiv.org/abs/1906.10100  
  
  "From Scattering Amplitudes to Classical Physics: Universality, Double Copy and Soft Theorems" by Y. F. Bautista, A. Guevara, https://arxiv.org/abs/1903.12419                                                                                                           
• "Bounds on chaos from the eigenstate thermalization hypothesis" by C. Murthy, M. Srednicki, https://arxiv.org/abs/1906.10808
  
  "Typicality and thermality in 2d CFT" by S. Datta, P. Kraus, B. Michel https://arxiv.org/abs/1904.00668
  
  "Lack of thermalization in (1+1)-d QCD at large Nc" by Axel Cortés Cubero, Neil J. Robinson https://arxiv.org/pdf/1908.00270.pdf
                                                                           
• "Conformality Lost" by David B. Kaplan, Jong-Wan Lee, Dam T. Son, Mikhail A. Stephanov   https://arxiv.org/abs/0905.4752 
  
  "Symmetry Breaking in Coupled SYK or Tensor Models" by J. Kim, I. Klebanov, G. Tarnopolsky, W. Zhao https://arxiv.org/abs/1902.02287

• "A Universal Relation Between Corrections to Entropy and Extremality" by Garrett Goon, Riccardo Penco https://arxiv.org/abs/1909.05254 

You are welcome to propose other papers by clicking the comments button below. Also, since the ideal is to have a discussion about these papers,  it would be great if as many people as possible read the papers ahead of time.

Here is some practical information for this year's newcomers

where : CPHT, Ecole Polytechnique, Salle de Conférence Louis Michel (Bât.6)

when:   every other Friday at 2:15 p.m., starting Oct. 10th

topics:  recent papers on the quantum structure of black holes, bulk effective field theory, bulk reconstruction (via bootstrap/entanglement), asymptotic symmetries (BMS)

how it works: one person prepares a presentation, and everyone else reads the paper and prepares for a discussion. Papers can either be chosen from the suggested readings on this website, or the speaker can suggest a paper to read, which should fit with the general topic of the journal club.  

practical:

•  directions to the CPHT can be found at https://www.cpht.polytechnique.fr/?q=fr/node/4
•  we will provide free coffee  at the start of the journal club 
•  internet is provided via eduroam 

Journal club dates in spring 2019

The dates of the journal club until summer 2019 are:

• Fri, May 31st volunteer needed!                                                                      
• on Friday, May 10th , Emil Martinec will explain the core ideas in ``JT gravity as a matrix integral'' by Saad, Shenker and Stanford  arXiv:1903.11115, which attempts a nonperturbative definition of (nearly) AdS2 quantum gravity through matrix model techniques. This work follows on a rich history of attempts to quantize 2d gravity, some of which will be described.  Background material for these aspects of the discussion is older work on the relation between matrix models and Liouville gravity on which much of their discussion is based:

  Matrix models and 2D string theory  Emil J. Martinec  hep-th/0410136 | PDF

  Minimal string theory Nathan Seiberg, David Shih  hep-th/0409306 | PDF
  Lectures on 2-D gravity and 2-D string theory Paul H. Ginsparg , Gregory W. Moore e-Print: hep-th/9304011 | PDF
  
  
                                                                                                              
• on Friday, Apr 19th , Ander Retolaza will present an overview of `` On de Sitter vacua in String theory compactifications’’  based on 1804.01120, 1808.08967 and 1610.01533. Additional material can be found in hep-th/0007018, hep-th/0105097, hep-th/0301240, 0805.1029.                                                                                   
• on Friday, Mar 22nd, Monica Guica  will present the paper « Local subsystems in gauge theory and gravity" by William Donnelly and Laurent Freidel https://arxiv.org/abs/1601.04744. Additional material can be found in https://arxiv.org/abs/1406.7304 by the first author.

First four journal clubs in 2019

 

The first four journal clubs of 2019 will take place on:

• on Friday, Mar 1st at 2:15 p.m., Eric Mefford will discuss "Probing typical black hole microstates" by de Boer, van Breukelen, Lokhande, Papadodimas, and Verlinde (1901.08527), starting with  an overview of Tomita-Takesaki theory from Witten's lecture notes on entanglement   entropy (1803.04993).        
• on Friday, Feb 15th at 2:15 p.m., Luca Ciambelli will present "Is there a breakdown of effective field theory at the horizon of an extremal black hole?" by Shahar Hadar and Harvey S. Reall,  https://arxiv.org/pdf/1709.09668.pdf                                                                                                      
  
• on Friday, Feb 1st at 2:15 p.m.,Daniel Mayerson will present "Emergent classical spacetime from microstates of an incipient black hole" by Vijay Balasubramanian, David Berenstein, Aitor Lewkowycz, Alexandra Miller, Onkar Parrikar, Charles Rabideau, https://arxiv.org/pdf/1810.13440.pdf                   
• Friday, Jan 18th at 10:15 a.m. (note unusual time!), presented by Chiara Toldo on "Microscopic origin of the Bekenstein-Hawking entropy of supersymmetric AdS5 black holes" by Alejandro Cabo-Bizet, Davide Cassani, Dario Martelli, Sameer Murthy: https://arxiv.org/abs/1810.11442 and make connections to https://arxiv.org/abs/1812.09613 (Francesco Benini, Paolo Milan) and https://arxiv.org/abs/1705.05383 (Seyed Morteza Hosseini, Kiril Hristov, Alberto Zaffaroni).                                                       

Next journal clubs in 2018

The next journal clubs before the end of the year are:

•                                                   
•  on Friday, Nov 30th, Ruben Monten will present  "dS/dS and TTbar" by Victor Gorbenko, Eva Silverstein and  Gonzalo Torroba, arXiv: 1811.07965                                                                           arXiv: 1811.07965

• on Friday, Nov 16th, Kenta Suzuki will present  ``A semiclassical ramp in SYK and in gravity'' by Phil Saad, Stephen H. Shenker and Douglas Stanford arXiv: 1806.06840                                                                                             
• on Tuesday, Nov 6th, Severin Lüst will present the paper "Towards a proof of the Weak Gravity Conjecture" by Alfredo Urbano, arXiv: 1810.05621

• on Friday, Oct 19th, Fidel Schaposnik will present  "Eternal traversable wormhole'' by Juan Maldacena and Xiao-Liang Qi arXiv: 1804.00491                                                                           
   

New time for the journal club!

In order to better organise our Fridays, the journal club has been moved to Friday afternoons at 2:15 p.m. The location will be Salle de Conférence Louis Michel (Bât.6 CPHT), unless specified otherwise. Coffee will be served in the CPhT coffee area at 2 p.m.

The next journal club will be given on Friday, Sept. 21st by Emilio Trevisani on ``Light-ray operators in conformal field theory''

The journal club comes back!

Dear all, this academic year's journal club will kick off on September 7th, as follows

• on Friday, Sept. 7th, Iosif Bena will present ``To gauge or not to gauge?'' by Juan Maldacena and Alexey Milekhin, https://arxiv.org/abs/1802.00428       
• on Friday, Sept. 21st, Emilio Trevisani will present ``Light-ray operators in conformal field theory''  by Petr Kravchuk and David Simmons-Duffin https://arxiv.org/abs/1805.00098

Other papers that are up for discussion are:

• https://arxiv.org/pdf/1707.02325.pdf , ``Pure states in the SYK model and nearly-AdS2 gravity'' by Ioanna Kourkoulou and Juan Maldacena                        
• https://arxiv.org/pdf/1804.00491.pdf,  ``Eternal traversable wormhole'' by Juan Maldacena and Xiao-Liang Qi                                                                            
• https://arxiv.org/pdf/1806.06840.pdf , ``A semiclassical ramp in SYK and in gravity'' by Phil Saad, Stephen H. Shenker and Douglas Stanford
   

You are welcome to propose other papers by clicking the comments button below. Also, since the ideal is to have a discussion about these papers,  it would be great if as many people as possible read the papers ahead of time.

Here is some practical information for this year's newcomers

where : CPHT, Ecole Polytechnique, Salle de Conférence Jean Lascoux (Aile0)

when:   every other Friday at 10:15 a.m., starting Oct. 13th

topics:  recent papers on the quantum structure of black holes, bulk effective field theory, bulk reconstruction (via bootstrap/entanglement), SYK, asymptotic symmetries (BMS)

how it works: one person prepares a presentation, and everyone else reads the paper and prepares for a discussion. Papers can either be chosen from the suggested readings on this website, or the speaker can suggest a paper to read, which should fit with the general topic of the journal club.  

practical:

•  directions to the CPHT can be found at https://www.cpht.polytechnique.fr/?q=fr/node/4
•  we are planning to provide free coffee and croissants at the start of the journal club 
•  internet is provided via eduroam 
•  after the journal club, we can all have lunch at the canteen of the Ecole Polytechnique. The seminar room will be reserved all day for those people who want to spend the rest of the afternoon at the CPHT.