Physics

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...

Abstract: The 1+1-dimensional adjoint QCD theory (namely SU(N) gauge theory coupled to a Majorana fermion in the adjoint representation of the gauge group) has two curious properties.  When the fermion is massless, the theory exhibits screening of...

Abstract: What is the mathematical question about the S-matrix to which string amplitudes are the answer? In this talk, I will show that both the four-point Veneziano and Virasoro-Shaprio amplitudes, along with the string spectrum itself, are the...

Abstract: AI progress is accelerating, and now the leaders expect “artificial general intelligence” (AGI) in 2 to 3 years. While difficult to believe, we must prepare for the possibility. We can take some lessons from previous episodes in which...

Abstract: The holographic principle states that in the limit of a large number of degrees of freedom, some quantum systems give rise to an emergent gravitational spacetime with one more dimension. What are these quantum systems, and which properties...

Abstract: Despite the undeniable success of the Large Hadron Collider (LHC), Beyond the Standard Model (BSM) physics remains elusive. In this talk, I will outline a multifaceted strategy to maximize discovery potential at current and future high...

Abstract: I will start with a broad overview of the theory of initial conditions of the universe, what we know and what we hope to know in the near future.

Then I will describe some recent work. Motivated by precision calculations in primordial...

Abstract: A remarkable feature of general relativity is the presence of spacetime singularities. One of the central aims of a complete theory of (quantum) gravity is to resolve these singularities. In this talk, I will describe ongoing work—building...