[Lecture] "Massless higher spins and cosmology" by Prof. Ergin Sezgin

Quantum Gravity Unit (Neiman Unit) would like to invite you to a lecure by Prof. Ergin Sezgin from Texas A&M University

Title: "Massless higher spins and cosmology"

Abstract:
We present a Freedman-Robertson-Walker solution of higher spin theory in four dimesions. It is obtained by employing a holomorphic factorization in noncommutative twistor space and gauge functions. We interpret the FRW solution in the context of inflationary cosmology. In interpreting the solution in terms of Fronsdal-type fields in spacetime, a field-dependent higher spin transformation is required, which is implemented at leading order. We also observe that the factorization method provides a convenient framework for setting up a perturbation theory around the exact solutions, and we propose that the nonlinear completion of particle excitations over FRW requires black hole-like states.