title: Matter-wave bright solitons in spin-orbit coupled Bose-Einstein condensates.
abstract: We study matter-wave bright solitons in spin-orbit coupled Bose-Einstein condensates with attractive interactions. We use a multiscale expansion method to identify solution families for chemical potentials in the semi-infinite gap of the linear energy spectrum. Depending on the linear and spin-orbit coupling strengths, the solitons may present either a sech2-shaped or a modulated density profile reminiscent of the stripe phase of spin-orbit coupled repulsive Bose-Einstein condensates. Our numerical results are in excellent agreement with our analytical findings and demonstrate the potential robustness of solitons for experimentally relevant conditions.
authors.affiliation: Department of Physics, University of Athens, Panepistimiopolis, Zografos, Athens 15784, Greece.
authors.forename: V
authors.initials: V
authors.lastname: Achilleos
authors.forename: D J
authors.initials: DJ
authors.lastname: Frantzeskakis
authors.forename: P G
authors.initials: PG
authors.lastname: Kevrekidis
authors.forename: D E
authors.initials: DE
authors.lastname: Pelinovsky