Organizers: Chris Akers, Netta Engelhardt, Harold Erbin, Ping Gao, Patrick Jefferson, Washington Taylor
Held every Wednesday, 3-4pm EST.


September 8
Jordan Cotler, Harvard
Title: Black hole microstate statistics from Euclidean wormholes

September 15
Geoff Penington, Berkeley
Title:  Pythons and Tensor Networks are a Few of My Favorite Things
Abstract: I’ll solve quantum gravity with pythons and/or tensor networks.

September 22
 Daniel Mayerson, IPhT, Saclay
Title: Fuzzball Shadows: Emergent Horizons from Microstructure
Abstract: The advent of black hole imaging has opened a new window into probing the horizon scale of black holes. An important question is whether string theory results for black hole physics can predict interesting and observable features that current and future experiments can probe. I will discuss the physical properties of four-dimensional, string-theoretical, horizonless “fuzzball” geometries by means of imaging their shadows. Their microstructure traps light rays straying near the would-be horizon on long-lived, highly redshifted chaotic orbits. In fuzzballs sufficiently near the scaling limit this creates a shadow much like that of a black hole, while avoiding the paradoxes associated with an event horizon. Finally, I will consider comparing such fuzzball images to their black hole counterparts. In particular, detailed measurements of higher order photon rings have the potential to discriminate between fuzzballs and black holes in future observations.

September 29
Ted Erler, CEICO (remote)
Title: Relating covariant and lightcone string field theories
Abstract: We describe recent work which aims to construct a field transformation which relates Witten’s open bosonic string field theory and the lightcone string field theory of Kaku and Kikkawa.

October 6
Ashoke Sen, Harish-Chandra Institute (remote)
Title: TBA

Tuesday, October 12
Jennifer Lin, Oxford (remote)
Title: TBA

October 20
Daniel Jafferis, Harvard
Title: TBA

October 27
Ben Heidenreich, Amherst (remote)
Title: TBA

November 3
Fabian Ruehle, Northeastern
Title: TBA

November 10
Herman Verlinde, Princeton
Title: TBA

November 17
Brian Swingle, Brandeis
Title: TBA

December 1
Xi Yin, Harvard
Title: TBA

February 24
Roberto Emparan
Title: Quantum BTZ black hole

March 3
Kenneth Intriligator, UCSD
Title: RG flows, anomalies, and 2-group global symmetries in 4d and 6d

March 10
Simeon Hellerman, IPMU Tokyo
Title: Quantum Information Theory of the Gravitational Anomaly

March 17
Dieter Luest, LMU Munich
Title: The swampland at a large number of space-time dimensions

March 24
Yasunori Lee, IPMU
Title: Some comments on 6d global gauge anomalies

March 31
Edgar Shaghoulian

April 7
Jorrit Kruthoff, Stanford
Title: Classical aspects of black hole interiors

April 14
Emily Nardoni, UCLA
Title: From SU(N) Seiberg-Witten Theory to Adjoint QCD

April 21
Suvrat Raju, ICTS

April 28
Alejandra Castro

May 5
Xiaoliang Qi, Stanford
Title: Entanglement island, miracle operators and the firewall

May 12
Dan Freed, UT Austin​​

May 19
Sergio Hernandez–Cuenca , UCSB