Name: Celestial Holography Summer School 2024
Start: 2024-07-22T08:00:00-04:00
End: 2024-07-26T17:00:00-04:00
Location: Perimeter Institute for Theoretical Physics

Celestial Holography Summer School 2024

from Monday, July 22, 2024 (8:00 a.m.) to Friday, July 26, 2024 (5:00 p.m.)

Monday, July 22, 2024

8:00 a.m. Registration
Registration
8:00 a.m. - 8:45 a.m.

8:45 a.m. OPENING REMARKS
OPENING REMARKS
8:45 a.m. - 9:00 a.m.
Room: PI/1-100 - Theatre
9:00 a.m. Lecture - Celestial Holography Ia - Ana-Maria Raclariu (King's College London)
Lecture - Celestial Holography Ia
- Ana-Maria Raclariu (King's College London)
9:00 a.m. - 10:00 a.m.
Room: PI/1-100 - Theatre
10:00 a.m. Lecture - Canonical a - Prahar Mitra (University of Amsterdam)
Lecture - Canonical a
- Prahar Mitra (University of Amsterdam)
10:00 a.m. - 11:00 a.m.
Room: PI/1-100 - Theatre
11:00 a.m. Break
Break
11:00 a.m. - 11:30 a.m.
11:30 a.m. Lecture - Celestial Holography Ib - Ana-Maria Raclariu (King's College London)
Lecture - Celestial Holography Ib
- Ana-Maria Raclariu (King's College London)
11:30 a.m. - 12:30 p.m.
Room: PI/1-100 - Theatre
12:30 p.m. Lunch
Lunch
12:30 p.m. - 2:30 p.m.
2:30 p.m. Lecture - Amplitudes a - Sebastian Mizera (Institute for Advanced Study)
Lecture - Amplitudes a
- Sebastian Mizera (Institute for Advanced Study)
2:30 p.m. - 3:30 p.m.
Room: PI/1-100 - Theatre
3:30 p.m. Break
Break
3:30 p.m. - 4:00 p.m.
4:00 p.m. Vision Talk - Celestial symmetries from twistor theory - Lionel Mason (University of Oxford)
Vision Talk - Celestial symmetries from twistor theory
- Lionel Mason (University of Oxford)
4:00 p.m. - 4:45 p.m.
Room: PI/1-100 - Theatre Celestial symmetry algebras arise from the OPEs of soft gravitons giving rise to the so-called `Lw_{1+\infty} algebra'. This talk will explain how this algebra can be can be understood as the local structure preserving local diffeomorphisms of twistor space. This can be naturally deformed to yield analogues with cosmological constant following https://arxiv.org/abs/2403.18011. We also give a brief introduction to twistor space actions to show how Noether arguments can be used to obtain improved associated charge and flux integrals as originally found by Friedel, Pranzetti and Raclariu; this is joint work with Adam Kmec, Romain Ruzziconi and Akshay Yelleshpur-Srikant https://arxiv.org/abs/2407.04028. If there is time there will be some further open-ended discussion of open questions in celestial holography via twistor theory.
4:45 p.m. Free Time
Free Time
4:45 p.m. - 6:45 p.m.

6:45 p.m. TA Session - Celestial Holography (Sruthi Narayanan / Adam Ball)
TA Session - Celestial Holography (Sruthi Narayanan / Adam Ball)
6:45 p.m. - 8:00 p.m.
Room: PI/4-405 - Bob Room
Tuesday, July 23, 2024
9:00 a.m. Lecture - Celestial Holography IIa - Andrea Puhm (Ecole Polytechnique - CPHT)
Lecture - Celestial Holography IIa
- Andrea Puhm (Ecole Polytechnique - CPHT)
9:00 a.m. - 10:00 a.m.
Room: PI/1-100 - Theatre
10:00 a.m. Lecture - Canonical b - Prahar Mitra (University of Amsterdam)
Lecture - Canonical b
- Prahar Mitra (University of Amsterdam)
10:00 a.m. - 11:00 a.m.
Room: PI/1-100 - Theatre
11:00 a.m. Break
Break
11:00 a.m. - 11:30 a.m.
11:30 a.m. Lecture - Celestial Holography IIb - Andrea Puhm (Ecole Polytechnique - CPHT)
Lecture - Celestial Holography IIb
- Andrea Puhm (Ecole Polytechnique - CPHT)
11:30 a.m. - 12:30 p.m.
Room: PI/1-100 - Theatre
12:30 p.m. Group Photo
Group Photo
12:30 p.m. - 12:40 p.m.
Room: PI/1-119 - Atrium

12:40 p.m. Lunch
Lunch
12:40 p.m. - 2:30 p.m.
2:30 p.m. Lecture - Amplitudes b - Sebastian Mizera (Institute for Advanced Study)
Lecture - Amplitudes b
- Sebastian Mizera (Institute for Advanced Study)
2:30 p.m. - 3:30 p.m.
Room: PI/1-100 - Theatre
3:30 p.m. Break
Break
3:30 p.m. - 4:00 p.m.
4:00 p.m. Vision Talk - Taking Λ out of It? - Rob Myers (Perimeter Institute)
Vision Talk - Taking Λ out of It?
- Rob Myers (Perimeter Institute)
4:00 p.m. - 4:45 p.m.
Room: PI/1-100 - Theatre
4:45 p.m. Poster Session
Poster Session
4:45 p.m. - 6:45 p.m.

6:45 p.m. TA Session - Canonical/Carollian (Luca Ciambelli)
TA Session - Canonical/Carollian (Luca Ciambelli)
6:45 p.m. - 8:00 p.m.
Room: PI/4-405 - Bob Room
Wednesday, July 24, 2024
9:00 a.m. Lecture - Carrollian Physics a - Romain Ruzziconi (University of Oxford)
Lecture - Carrollian Physics a
- Romain Ruzziconi (University of Oxford)
9:00 a.m. - 10:00 a.m.
Room: PI/1-100 - Theatre
10:00 a.m. Lecture - IR S-matrix a - Hofie Hannesdottir (Institute for Advanced Study)
Lecture - IR S-matrix a
- Hofie Hannesdottir (Institute for Advanced Study)
10:00 a.m. - 11:00 a.m.
Room: PI/1-100 - Theatre
11:00 a.m. Break
Break
11:00 a.m. - 11:30 a.m.

11:30 a.m. TA Session - Amplitudes
TA Session - Amplitudes
11:30 a.m. - 12:30 p.m.
Room: PI/4-405 - Bob Room

12:30 p.m. Lunch
Lunch
12:30 p.m. - 2:30 p.m.

2:30 p.m. // Free Time
// Free Time
2:30 p.m. - 3:15 p.m.
3:15 p.m. Lightning Talks
Lightning Talks
3:15 p.m. - 4:45 p.m.
Room: PI/1-100 - Theatre
Contributions

3:15 p.m. Asymptotic symmetries for logarithmic soft theorems - Sangmin Choi (University of Amsterdam)

3:20 p.m. Quantum Corrections to the Thermodynamics of Cold Black Holes - Ahmed Sheta

3:25 p.m. Celestial Chiral Algebras of self-dual Black Holes - Simon Heuveline (University of Cambridge)

3:30 p.m. A Celestial Dual for MHV Amplitudes - Walker Melton (Harvard University)

3:35 p.m. Collinear singularities from a double cover of twistor space - Seraphim Hsieh Jarov (Perimeter Institute)

3:40 p.m. The Bulk Model of Dissipative Dynamics On Lie Group - Afshin Besharat (McMaster University and Perimeter Institute)

3:45 p.m. Higher-Spin Charges in Gravity - Nicolas Cresto (Perimeter Institute)
4:45 p.m. // Free Time
// Free Time
4:45 p.m. - 6:00 p.m.

6:00 p.m. Banquet
Banquet
6:00 p.m. - 8:00 p.m.
Thursday, July 25, 2024
9:00 a.m. Lecture - Carrollian Physics b - Romain Ruzziconi (University of Oxford)
Lecture - Carrollian Physics b
- Romain Ruzziconi (University of Oxford)
9:00 a.m. - 10:00 a.m.
Room: PI/1-100 - Theatre
10:00 a.m. Lecture - IR S-matrix b - Hofie Hannesdottir (Institute for Advanced Study)
Lecture - IR S-matrix b
- Hofie Hannesdottir (Institute for Advanced Study)
10:00 a.m. - 11:00 a.m.
Room: PI/1-100 - Theatre
11:00 a.m. Break
Break
11:00 a.m. - 11:30 a.m.

11:30 a.m. TA Session - IR S-matrix
TA Session - IR S-matrix
11:30 a.m. - 12:30 p.m.
Room: PI/4-405 - Bob Room

12:30 p.m. Lunch
Lunch
12:30 p.m. - 2:30 p.m.
2:30 p.m. Lecture - Twistors a - David Skinner (University of Cambridge)
Lecture - Twistors a
- David Skinner (University of Cambridge)
2:30 p.m. - 3:30 p.m.
Room: PI/1-100 - Theatre
3:30 p.m. Break
Break
3:30 p.m. - 4:00 p.m.
4:00 p.m. Vision Talk - Celestial holography: past, present and future - Andy Strominger (Harvard University)
Vision Talk - Celestial holography: past, present and future
- Andy Strominger (Harvard University)
4:00 p.m. - 4:45 p.m.
Room: PI/1-100 - Theatre
4:45 p.m. // Free Time
// Free Time
4:45 p.m. - 6:45 p.m.

6:45 p.m. TA Session - Twistors / Twisted Holography (Roland Bittleston / Kasia Budzik)
TA Session - Twistors / Twisted Holography (Roland Bittleston / Kasia Budzik)
6:45 p.m. - 8:00 p.m.
Room: PI/4-405 - Bob Room
Friday, July 26, 2024
9:00 a.m. Lecture - Twistors b - David Skinner (University of Cambridge)
Lecture - Twistors b
- David Skinner (University of Cambridge)
9:00 a.m. - 10:00 a.m.
Room: PI/1-100 - Theatre
10:00 a.m. Lecture - Twisted Holography a - Davide Gaiotto (Perimeter Institute)
Lecture - Twisted Holography a
- Davide Gaiotto (Perimeter Institute)
10:00 a.m. - 11:00 a.m.
Room: PI/1-100 - Theatre
11:00 a.m. Break
Break
11:00 a.m. - 11:30 a.m.
11:30 a.m. Lecture - Twisted Holography b - Davide Gaiotto (Perimeter Institute)
Lecture - Twisted Holography b
- Davide Gaiotto (Perimeter Institute)
11:30 a.m. - 12:30 p.m.
Room: PI/1-100 - Theatre
12:30 p.m. Lunch
Lunch
12:30 p.m. - 2:30 p.m.
2:30 p.m. Panel Discussion - Kevin Costello Sabrina Pasterski Laurent Freidel (Perimeter Institute) Andrea Puhm (Ecole Polytechnique - CPHT) David Skinner (University of Cambridge)
Panel Discussion
- Kevin Costello
- Sabrina Pasterski
- Laurent Freidel (Perimeter Institute)
- Andrea Puhm (Ecole Polytechnique - CPHT)
- David Skinner (University of Cambridge)
2:30 p.m. - 3:30 p.m.
Room: PI/1-100 - Theatre
3:30 p.m. CLOSING REMARKS
CLOSING REMARKS
3:30 p.m. - 3:45 p.m.
Room: PI/1-100 - Theatre

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