Compacton existence and spin-orbit density dependence in Bose-Einstein condensates
We demonstrate the existence of compactons matter waves in binary mixtures of Bose-Einstein condensates (BEC) trapped in deep optical lattices (OL) subjected to equal contributions of intraspecies Rashba and Dresselhaus spin-orbit coupling (SOC) under periodic time modulations of the intraspecies...
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| Main Authors: | , , , , |
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| Format: | Article |
| Language: | en en |
| Published: |
American Physical Society
2023
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| Subjects: | |
| Online Access: | http://irep.iium.edu.my/105441/1/105441_Compacton%20existence.pdf http://irep.iium.edu.my/105441/2/105441_Compacton%20existence_SCOPUS.pdf http://irep.iium.edu.my/105441/ https://journals.aps.org/pre/abstract/10.1103/PhysRevE.107.044218 |
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| Summary: | We demonstrate the existence of compactons matter waves in binary mixtures of Bose-Einstein condensates
(BEC) trapped in deep optical lattices (OL) subjected to equal contributions of intraspecies Rashba and Dresselhaus
spin-orbit coupling (SOC) under periodic time modulations of the intraspecies scattering length. We show
that these modulations lead to a rescaling of the SOC parameters that involves the density imbalance of the two
components. This gives rise to density dependent SOC parameters that strongly influence the existence and the
stability of compacton matter waves. The stability of SOC-compactons is investigated both by linear stability
analysis and by time integrations of the coupled Gross-Pitaevskii equations. We find that SOC restricts the
parameter ranges for stable stationary SOC-compacton existence but, on the other side, it gives a more stringent
signature of their occurrence. In particular, SOC-compactons should appear when the intraspecies interactions
and the number of atoms in the two components are perfectly balanced (or close to being balanced for the
metastable case). The possibility to use SOC-compactons as a tool for indirect measurements of the number of
atoms and/or the intraspecies interactions is also suggested. |
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