Modulational instability, inter-component asymmetry and formation of quantum droplets in one-dimensional binary Bose gases
arXiv:1911.02676 · doi:10.3390/sym12010174
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.
arXiv commentTo be published in Symmetry (special issue on Symmetry and Mesoscopic Physics)
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