Physics

Abstract: Meromorphic amplitudes are the simplest non-trivial scattering amplitudes. They describe the exchange of infinitely many higher spin resonances in theories like string theory and large N gauge theories. Yet, despite being very simple...

Abstract: Many recent developments in matrix models and topological string theory have been driven by resurgence methods. 

I will introduce basic resurgence concepts in the context of hermitian matrix models (and their double scaling limits) and...

Abstract: I will describe constructions of lattice field theories that assign a single bosonic variable to each site, rather a conjugate pair x,p. The information to realize a non-trivial dynamics is realized by non-trivial Poisson brackets between...

Abstract: I will discuss work in progress with M. Disconzi on spherically symmetric solutions to the Einstein– Euler equations. The main result is local well-posedness for a class of initial data satisfying the physical vacuum condition. This is the...

Abstract: I will summarize recent results on the large N limit of path integrals of 3d SCFTs arising on the worldvolume of N M2-branes placed on compact Euclidean manifolds. The leading N^3/2 term in the large N expansion of these "free energies"...

Abstract: The Miura transformation is a powerful formalism to construct generators of vertex operator algebras in free field representation. In this talk, I will explain that Miura operators are R-matrices of a certain quantum algebra, and comment...

Abstract: I will give an informal discussion of the bulk Hilbert space of JT gravity with and without matter, based on 2403.08696. 

Abstract: I will introduce two new families of critical string theories in two dimensions and explain that, when viewed as two-dimensional quantum gravity on the worldsheet, each is equivalent to a matrix model. The first worldsheet string theory...

Abstract: In 2022, the Event Horizon Telescope collaboration revealed the first images of the shadow of our Milky Way supermassive black hole, Sagittarius A* (Sgr A*). Since its detection in the mid-70s, this bright radio source in the Galactic...

Abstract: Recently it has been shown that black holes decohere quantum superpositions in their exterior, and suggested that this may be of fundamental importance for their quantum description [arXiv:2205.06279, arXiv:2301.00026, arXiv:2311.11461]. ...