title: Transverse instability of straight vortex lines in dipolar Bose-Einstein condensates.
abstract: The physics of vortex lines in dipolar condensates is studied. Because of the nonlocality of the dipolar interaction, the 3D character of the vortex plays a more important role in dipolar gases than in typical short-range interacting ones. In particular, the dipolar interaction significantly affects the stability of the transverse modes of the vortex line. Remarkably, in the presence of a periodic potential along the vortexline, the spectrum of transverse modes shows a rotonlike minimum, which eventually destabilizes the straight vortex when the BEC as a whole is still stable, opening the possibility for new scenarios for vortex-line configurations in dipolar gases.
authors.affiliation: Institut für Theoretische Physik, Leibniz Universität Hannover, Appelstr. 2, D-30167, Hannover, Germany.
authors.forename: M
authors.initials: M
authors.lastname: Klawunn
authors.forename: R
authors.initials: R
authors.lastname: Nath
authors.forename: P
authors.initials: P
authors.lastname: Pedri
authors.forename: L
authors.initials: L
authors.lastname: Santos