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arXiv · 1911.02676

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
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Abstract

Quantum droplets are ultradilute liquid states which 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.

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Thudiyangal Mithun, Aleksandra Maluckov, Kenichi Kasamatsu, Boris A. Malomed, Avinash Khare. 2019-11-06. Modulational instability, inter-component asymmetry and formation of quantum droplets in one-dimensional binary Bose gases. https://doi.org/10.3390/sym12010174

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