Dynamics of solitary waves in ultracold gases in terms of observable quantities
Autori: Pitaevskii LP.
Affiliazione autori: Russian Acad Sci, Kapitza Inst Phys Problems, Ul Kosygina 2, Moscow 119334, Russia; Univ Trento, Dipartimento Fis, I-38123 Povo, Trento, Italy; INO CNR BEC Ctr, I-38123 Povo, Trento, Italy
Abstract: A variety of solitary waves, such as solitons, vortex rings, solitonic vortices, and more complex entities, have recently been predicted to exist. They can move in superfluid ultracold gases along elongated traps. The theoretical description of this motion requires knowledge of the inertial soliton mass and the effective number of particles in it as functions of the soliton energy. While these functions can be calculated by a microscopic theory, it is also possible to express them directly in terms of observable quantities, such as the order parameter phase jump and the particle number deficiency in the soliton. In this article, the corresponding equations are derived in a simple and physically clear way and applied to the recently predicted ‘magnetic soliton’ in mixtures of Bose gases in various spin states.
Volume: 59 (10) Da Pagina: 1028 A: 1033
Parole chiavi: solitary waves; solitons; local and canonical momenta; Ginzburg-Landau wave function; inertial mass; phase jump; effective number of particles; particle number deficiency; magnetic solitonDOI: 10.3367/UFNe.2016.08.037891Citazioni: 7dati da “WEB OF SCIENCE” (of Thomson Reuters) aggiornati al: 2022-09-25Riferimenti tratti da Isi Web of Knowledge: (solo abbonati) Link per visualizzare la scheda su IsiWeb: Clicca quiLink per visualizzare la citazioni su IsiWeb: Clicca qui