Physics

Abstract: Continuous Spin Particles (CSPs) arise naturally from Wigner's classification of the unitary representations of the Poincare group. Conversely, defining an interacting (quantum field) theory for these particles is notoriously difficult. In...

This week we will not have a formal talk.

We intend to have a general discussion about de-Sitter, Hartle Hawking, and questions around those topics.

If you decide come, please plan to present some question, or make some comment. 

Abstract: Is there a geometric object underlying the cosmological wavefunction for Tr $\phi^3$ theory, just as associahedra underlie scattering amplitudes? In this talk, I will describe a new class of polytopes that answer this question. I will...

Abstract: I will discuss dilaton gravity with a sine potential, where periodic shifts of the dilaton (that leave the potential invariant) are treated as a redundancy. Most things I will say hold true for generic periodic potentials, but the sine...

Abstract: I will discuss a geometric approach to the factorization puzzle that involves coadjoint orbits and Berry phases. The mathematical formalism introduced is applied both to quantum mechanics examples and to AdS/CFT.  It is shown how the...

Abstract: Consider the interaction of one-dimensional surface gravity waves on top of an ideal fluid of infinite depth. Notably, for certain orientations of the wave vectors, the interaction matrix element vanishes, while for other orientations, the...