# Jing Zhou: Exponential Fermi Acceleration in a Resonant Billiard Model

**Time: **
Thu 2022-03-24 14.00

**Location: **
Zoom https://kth-se.zoom.us/j/61173989405

**Participating: **
Jing Zhou (Penn State)

**Abstract:** In this talk we show an infinite measure set of exponentially escaping orbits for a resonant Fermi accelerator, which is realized as a square billiard with a periodically oscillating platform. We use normal forms to describe how the energy changes in a period and we employ techniques for hyperbolic systems with singularities to show the exponential drift of these normal forms on a divided time-energy phase.