Physics

Abstract: Historically, the synergy between physics and geometry, from the time of Archimedes and Newton to the era of Einstein, has repeatedly catalyzed breakthroughs in physics and mathematics. In this presentation, we will explore a new narrative...

The identity of dark matter is one of the biggest outstanding questions in astrophysics today. The smallest galaxies in the universe, dwarf galaxies, are powerful probes of its identity, as they are composed predominantly of dark matter.  However...

Abstract: We begin with understanding scalar color-ordered amplitudes via the kinematic mesh and the ABHY associahedron. There are three important aspects of this construction: its zeros, large deformations and splitting. The zeros will imply the...

Abstract: One of the best understood AdS/CFT incarnations relates tensionless k=1 strings on AdS3 to a symmetric product CFT2. I will discuss an exact duality between string theory on a spacetime which is not asymptotically AdS and a non-conformal...

Abstract: We establish local well-posedness for the Einstein-Euler system with a physical vacuum boundary in spherical symmetry. Our proof relies on a new way of thinking about Einstein’s equations in spherical symmetry that is well-adapted to the...

Abstract: Quantum condensed matter has traditionally focused on ground states and equilibrium properties of spatially extended systems, such as electrons in crystalline materials. However, the advent of noisy-intermediate-scale-quantum (NISQ)...

Abstract: Informally, a quantum cellular automaton (QCA) describes some discrete-time local dynamics of a quantum system.  Formally, a QCA is a *-automoprhism of the algebra of local operators.  Local quantum circuits provide one example of QCA, but...

Abstract: In this talk, I will review a recent progress on the use of the Amplituhedron construction to calculate four-point scattering amplitudes in the planar N=4 SYM theory. This uses a novel expansion of the loop integrand using negative...

Abstract: Powerful techniques have been developed in quantum field theory that employ algebras of local operators, yet local operators cannot create physical charged states in gauge theory or physical nonzero-energy states in perturbative quantum...

Abstract: Be it numerical, formal, or rigorous, the typical setup for the evolution of spacetimes describing, for instance, the merger of two black holes is to make an ad hoc assumption on the initial data to have compactly supported gravitational...