title: Toroidal rotation driven by the polarization drift.
abstract: Starting from a phase space conserving gyrokinetic formulation, a systematic derivation of parallel momentum conservation uncovers a novel mechanism by which microturbulence may drive intrinsic rotation. This mechanism, which appears in the gyrokinetic formulation through the parallel nonlinearity, emerges due to charge separation induced by the polarization drift. The derivation and physical discussion of this mechanism will be pursued throughout this Letter.
authors.affiliation: Center for Astrophysics and Space Sciences and Department of Physics, University of California at San Diego, La Jolla, California 92093-0424, USA. cmcdevitt@ucsd.edu
authors.forename: C J
authors.initials: CJ
authors.lastname: McDevitt
authors.forename: P H
authors.initials: PH
authors.lastname: Diamond
authors.forename: O D
authors.initials: OD
authors.lastname: Gürcan
authors.forename: T S
authors.initials: TS
authors.lastname: Hahm