Speaker
Radu Roiban
(Penn State)
Description
Quantum scattering amplitudes, classically given by the
famous pictorial representation of Richard Feynman which
describe the many ways the collisions between particles
could take place in space-time, are a cornerstone of
today's quantum field theory.
In the past decade, we have learned a great deal about
scattering amplitudes for completely general theories.
Central to these developments has been the N = 4 Super-
Yang-Mills theory.
The quest to more loops, more legs and less symmetry led
to completely different ways of visualizing and computing
scattering amplitudes, some of which reach beyond the
standard framework of flat space relativistic quantum field
theory and place quantum scattering amplitudes at the
intersection several fields of physics (and mathematics).
We shall highlight some of the surprising advances and
illustrate them with examples from N=8 supergravity and
N = 4 super-Yang-Mills theory, discuss applications to
particle physics experiments, two-dimensional integrable
models and other observables in quantum field theories.
