Observing phase jumps of solitons in Bose-Einstein condensates

Kazuma Ohi, Shohei Watabe, Tetsuro Nikuni

Research output: Contribution to journalArticlepeer-review


The phase difference of the macroscopic wave function is a unique structure of the soliton in an atomic Bose-Einstein condensate (BEC). However, experiments on ultracold atoms so far have observed the valley of the density profile to study the dynamics of solitons. We propose a method to observe the phase difference of a soliton in a BEC by using an interference technique with Raman and rf pulses. We introduce a phase jump factor, which is an indicator to measure the phase difference between two points. It is demonstrated by using the projected Gross-Pitaevskii equation that an interference density ratio, the density ratio of two-component BECs after the Raman and rf pulses, reproduces the phase jump factor well. This technique will become an alternative method to study the decay and breakdown of a phase-imprinted soliton in atomic BECs.

Original languageEnglish
Article number053302
JournalPhysical Review A
Issue number5
Publication statusPublished - 2022 Nov

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics


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