Triangle Seminars
Wednesday, 23 Sep 2026
Description:
Gravity, Entanglement and Entropy will be held at the London Mathematical Society on 23 September 2026.
The conference will bring together researchers in mathematics, theoretical physics, quantum information and cosmology to discuss emerging connections between gravity, quantum entanglement and entropy, and their implications for our understanding of spacetime, black holes and quantum gravity.
Invited speakers:Sougato Bose, Alejandra Castro, Damian Galante, Orlando Luongo, Chara Marletto, Marika Taylor, Vlatko Vedral.
Gravity, Entanglement and Entropy will be held at the London Mathematical Society on 23 September 2026.
The conference will bring together researchers in mathematics, theoretical physics, quantum information and cosmology to discuss emerging connections between gravity, quantum entanglement and entropy, and their implications for our understanding of spacetime, black holes and quantum gravity.
Invited speakers:Sougato Bose, Alejandra Castro, Damian Galante, Orlando Luongo, Chara Marletto, Marika Taylor, Vlatko Vedral.
Posted by: Ginestra Bianconi
Thursday, 24 Sep 2026
An Effective S-Matrix Approach to Black Hole Mergers
📍 London
Hyun Jeong
(Tokyo)
Abstract:
In this talk, I will propose an effective S-matrix framework for describing low-frequency gravitational waves from black hole mergers. Instead of starting from a Lagrangian and performing its derivative expansion, we directly expand the observable in the low-frequency regime within the KMOC formalism. Organizing this expansion with soft theorems at O(G^2), I will show how the logarithmic tail, the recoil, and the nonlinear memory emerge from the one-loop amplitude and the graviton cut contribution. Finally, I will identify the matching data needed to fully determine the low-frequency waveform.
Reference: arXiv:2609.10329
In this talk, I will propose an effective S-matrix framework for describing low-frequency gravitational waves from black hole mergers. Instead of starting from a Lagrangian and performing its derivative expansion, we directly expand the observable in the low-frequency regime within the KMOC formalism. Organizing this expansion with soft theorems at O(G^2), I will show how the logarithmic tail, the recoil, and the nonlinear memory emerge from the one-loop amplitude and the graviton cut contribution. Finally, I will identify the matching data needed to fully determine the low-frequency waveform.
Reference: arXiv:2609.10329
Posted by: Kymani Armstrong-Williams