Modulational Instability, Inter-Component Asymmetry, and Formation of Quantum Droplets in One-Dimensional Binary Bose Gases
Thudiyangal MithunCenter for Theoretical Physics of Complex Systems, Institute for Basic Science, Daejeon 34141, KoreaAleksandra MaluckovVinca Institute of Nuclear Sciences, University of Belgrade, P. O. B. 522, 11001 Belgrade, SerbiaKenichi KasamatsuDepartment of Physics, Kindai University, Higashi-Osaka, Osaka 577-8502, JapanBoris A. MalomedDepartment of Physical Electronics, School of Electrical Engineering, Faculty of Engineering, and Center for Light-Matter Interaction, Tel Aviv University, Tel Aviv 69978, IsraelAvinash KhareDepartment of Physics, Savitribai Phule Pune University, Pune 411007, India
2020en
ABI
Аннотация
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.
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