Effective-range signatures in quasi-1D matter waves: sound velocity and solitons
Authors: Sgarlata F., Mazzarella G., Salasnich L.
Autors Affiliation: Univ Padua, Dipartimento Fis & Astron Galileo Galilei, I-835131 Padua, Italy; Consorzio Nazl Interuniv Sci Fis Mat CNISM, Unita Padova, I-835131 Padua, Italy; CNR, Ist Nazl Ott, Sezione Sesto Fiorentino, I-150019 Sesto Fiorentino, Italy
Abstract: We investigate ultracold and dilute bosonic atoms under strong transverse harmonic confinement using a 1D modified Gross-Pitaevskii equation (1D MGPE), which accounts for the energy dependence of the two-body scattering amplitude within an effective-range expansion. We study sound waves and solitons of the quasi-1D system, comparing the 1D MGPE results with the 1D GPE ones. We find that when the finite-size nature of the interaction is taken into account, the speed of sound and the density profiles of both dark and bright solitons show relevant quantitative changes with respect to predictions given by the standard 1D GPE.
Journal/Review: JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS
Volume: 48 (11) Pages from: 115301-1 to: 115301-7
KeyWords: ultracold gases; trapped gases; Boson systems; solitonsDOI: 10.1088/0953-4075/48/11/115301Citations: 7data from “WEB OF SCIENCE” (of Thomson Reuters) are update at: 2021-10-10References taken from IsiWeb of Knowledge: (subscribers only)Connecting to view paper tab on IsiWeb: Click hereConnecting to view citations from IsiWeb: Click here