Deep inelastic collision of two-dimensional anisotropic dipolar condensate solitons

The possibility of generating stable anisotropic solitons in dipolar Bose-Einstein condensates (BECs) leads to a different scenario not possible in a nondipolar BEC with contact interaction. We study the statics and dynamics of anisotropic bright solitons in quasi two-dimensional BECs consisting of polarized dipolar atoms. We study the collision dynamics of two such solitons at different velocities for different angles between the polarization and collision directions. The collision is found to be quasi elastic at large velocities. At small velocities the collision is inelastic leading to the formation of a coalesced soliton in an excited scissors mode, monopole mode or quadrupole mode. Also, at small velocities, after collision, a large change of direction of motion of the solitons is possible. The investigation is performed through a numerical solution of the underlying mean-field Gross-Pitaevskii equation. (C) 2021 Elsevier B.V. All rights reserved.

Automated summary

The possibility of generating stable anisotropic solitons in dipolar Bose-Einstein condensates leads to unique collision dynamics where collisions are quasi elastic at high velocities and inelastic at low velocities, resulting in the formation of coalesced solitons in different modes. The investigation was conducted numerically using the mean-field Gross-Pitaevskii equation to study the statics and dynamics of anisotropic bright solitons in quasi two-dimensional BECs with polarized dipolar atoms.