P H Y S I C S D E P T
D I S S E R T A T I O N D E F E N S E
Ph.D. Candidate: Matthew Dodelson
Research Advisor: Eva Silverstein
Location: Varian 355
Title: Stringy nonlocality and black hole horizons
Abstract: Strings are believed to spread out when observed at high energy. I'll discuss several approaches towards deriving this result, which I worked out in papers with Eva Silverstein and Gonzalo Torroba. The first is based on an analysis of the six-point scattering amplitude in string theory, and the second is based on tracing string interactions using a background dilaton field. Then I'll discuss applications to horizon physics, which are predicated on large boosts between an early infaller and a late observer.