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Quench-produced solitons in a box-trapped Bose-Einstein condensate

2020; American Physical Society; Volume: 2; Issue: 4 Linguagem: Inglês

10.1103/physrevresearch.2.043256

2643-1564

Eli Halperin, John L. Bohn,

Quantum, superfluid, helium dynamics

We describe a protocol to prepare solitons in a quasi-one-dimensional (quasi-1D) box-trapped Bose-Einstein condensate using a quench of the isotropic s-wave scattering length. A quench to exactly four times the initial 1D coupling strength creates one soliton at each boundary of the box, which then propagate in a uniform background density and collide with one another. In the ideal case, no nonsolitonic excitations are created during the quench. The procedure is robust against realistic box shapes, imperfections in the scattering length ramp rate, and a mismatch of the final scattering length. We simulate the condensate in full 3D and propose a modification to the protocol that is effective outside of the strict quasi-1D regime.Received 24 February 2020Revised 29 April 2020Accepted 28 October 2020DOI:https://doi.org/10.1103/PhysRevResearch.2.043256Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI.Published by the American Physical SocietyPhysics Subject Headings (PhySH)Research AreasBose gasesBose-Einstein condensatesPhysical SystemsSolitonsAtomic, Molecular & Optical