Gyroscopic Inflation
  We propose a new framework for multi-field inflation in which a nearly
constant potential energy is maintained during inflation before decreasing
rapidly, in a manner analogous to a classical top spinning upright for a long
time before falling down. We provide the simplest realization of such dynamics
as a well-controlled, weakly-coupled effective field theory with a global shift
symmetry. Nonperturbative quantum gravitational effects, which break global
symmetries, are suppressed in this model. Primordial gravitational waves may be
within experimental reach.
