Formation of matter-wave soliton molecules

Details Formation of matter-wave soliton molecules Formation of matter-wave soliton molecules

2010-12-16

arxiv.org/abs/1012.3762v1

Physics

Condensed Matter

Quantum Gases

4 pages, 3 figures

Scientific paper

We propose a method of forming matter-wave soliton molecules that is inspired by the recent experiment of Dris {\it et al.}. In the proposed set-up we show that if two solitons are initially prepared in phase and with a sufficiently small separation and relative velocity, a bound pair will always form. This is verified by direct numerical simulation of the Gross-Pitaevskii equation and by the derivation of the exact interaction energy of two solitons, which takes the form of a Morse potential. This interaction potential depends not only on the separation but also on the relative phase of the solitons and is essential for an analytical treatment of a host of other problems, such as the soliton gas and the Toda lattice of solitons.

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