Physics

Abstract: In this talk, I will introduce a new framework of quantum convolution to study stabilizer states and magic states in discrete-variable systems. Within this convolutional framework, we find that the stabilizer states play a similar role to...

Abstract: The moduli space of curves, M_g, is an object of pivotal interest in mathematics and theoretical physics. Even though it has been studied with tremendous effort, little is known about its topology. For instance, the total dimension of the...

Abstract: I will briefly review the factorisation of soft and collinear singularities in massless gauge theory amplitudes, and the structure of the soft anomalous dimension matrix. I will then discuss the implications of this factorisation for the...

Abstract: The spectrum of single-trace operators of order-one dimension, of holographic CFTs at strong coupling and large N, can be mapped to the spectrum of Kaluza-Klein (KK) excitations over the dual AdS supergravity solutions. Computing these KK...

Abstract: The count of black hole microstates is typically obtained from a supersymmetric index in weakly coupled string theory. I will discuss the index in the strongly coupled theory, as a functional integral in N=2 supergravity in asymptotically...

Abstract: I will review and revisit the quantum entropy of supersymmetric black holes, which is defined as a gravitational path integral in the near-horizon AdS2 region.

This has been studied in the past using different methods: loop calculations...

Abstract: I will briefly review the recent developments on hidden structures of (A)dS scattering amplitudes, known as the differential representation. This representation manifests the flat-space structure of (A)dS scattering, telling us that the (A...

Abstract: We add non-linear and state-dependent terms to the Hamiltonian of quantum field theory. The resulting low-energy theory, non-linear quantum mechanics, is causal, preserves probability and permits a consistent description of the process of...

Abstract:  It was recently shown that the von Neumann algebras of observables gravitationally dressed to the mass of a Schwarzschild-AdS black hole or an observer in de Sitter spacetime are Type II, and thus admit well-defined traces. The von...