Soliton collisions in Bose-Einstein condensates with current-dependent interactions

Abstract

We study general collisions between chiral solitons in Bose-Einstein condensates subject to combined attractive and current-dependent interatomic interactions. A simple analysis based on the linear superposition of the solitons allows us to determine the relevant time and space scales of the dynamics, which is illustrated by extensive numerical simulations. By varying the differential amplitude, the relative phase, the average velocity, and the relative velocity of the solitons, we characterize the different dynamical regimes that give rise to oscillatory and interference phenomena. Apart from the known inelastic character of the collisions, we show that the chiral dynamics involves an amplitude reduction with respect to the case of regular solitons. To compare with feasible ultracold gas experiments, the influence of harmonic confinement is analyzed in both the emergence and the interaction of chiral solitons.

15 pages, 12 figures

References in corpus (5)

• Formation of bright matter-wave solitons during the collapse of Bose-Einstein condensates
• Collisions of matter-wave solitons
• Realizing a 1D topological gauge theory in an optically dressed BEC
• Dynamics of domain walls in a Bose-Einstein condensate driven by density-dependent gauge field
• Modulational instability and soliton generation in chiral Bose-Einstein condensates with zero-energy nonlinearity

Cited by in corpus (4)

• Stationary and moving bright solitons in Bose-Einstein condensates with spin-orbit coupling in a Zeeman field
• Chiral currents in Bose-Einstein condensates subject to current-density interactions
• Excitation spectrum of vortex-lattice modes in a rotating condensate with a density-dependent gauge potential
• Spinor Bose-Einstein condensates subject to current-density interactions