Modulational instability, inter-component asymmetry, and formation of quantum droplets in one-dimensional binary bose gases

Thudiyangal Mithun*, Aleksandra Maluckov, Kenichi Kasamatsu, Boris A. Malomed, Avinash Khare

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

52 Scopus citations

Abstract

Quantum droplets are ultradilute liquid states that emerge from the competitive interplay of two Hamiltonian terms, the mean-field energy and beyond-mean-field correction, in a weakly interacting binary Bose gas. We relate the formation of droplets in symmetric and asymmetric two-component one-dimensional boson systems to the modulational instability of a spatially uniform state driven by the beyond-mean-field term. Asymmetry between the components may be caused by their unequal populations or unequal intra-component interaction strengths. Stability of both symmetric and asymmetric droplets is investigated. Robustness of the symmetric solutions against symmetry-breaking perturbations is confirmed.

Original languageEnglish
Article number174
JournalSymmetry
Volume12
Issue number1
DOIs
StatePublished - 2020

Funding

FundersFunder number
Indian National Science Academy
European Cooperation in Science and TechnologyCA 16221
Japan Society for the Promotion of Science17K05554, 18K03472
Israel Science Foundation1287/17
Ministarstvo Prosvete, Nauke i Tehnološkog RazvojaIII45010

    Keywords

    • Binary Bose-Einstein condensate
    • Modulational instability
    • Quantum droplet

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