Pulsating and persistent vector solitons in a Bose-Einstein condensate in a lattice upon phase separation instability

Abstract

We study numerically the outcome of the phase separation instability of a dual-species Bose-Einstein condensate in an optical lattice. When only one excitation mode is unstable a bound pair of a bright and dark soliton-like structures periodically appears and disappears, whereas for more than one unstable mode a persistent soliton-antisoliton pair develops. The oscillating soliton represents a regime where the two-species condensate neither remains phase-separated nor is dynamically stable.

submitted to PRL

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Cited by in corpus (13)

• Quantum dynamics of atomic bright solitons under splitting and re-collision, and implications for interferometry
• Energetically stable singular vortex cores in an atomic spin-1 Bose-Einstein condensate
• 3D quaternionic condensations, Hopf invariants, and skyrmion lattices with synthetic spin-orbit coupling
• Stochastic Growth Dynamics and Composite Defects in Quenched Immiscible Binary Condensates
• Symmetry breaking in binary Bose-Einstein condensates in the presence of an inhomogeneous artificial gauge field
• Topological interface physics of defects and textures in spinor Bose-Einstein condensates
• Compacton matter waves in binary Bose gases under strong nonlinear management
• Spin-orbit-coupling-induced phase separation in trapped Bose gases
• Fragmentation, domain formation and atom number fluctuations of a two-species Bose-Einstein condensate in an optical lattice
• Instabilities of a matter wave in a matter grating
• Antiferromagnetism in a bosonic mixture of rubidium (${}^{87}$Rb) and potassium (${}^{41}$K)
• Probing phase-separation in Bose-Fermi mixtures by the critical superfluid velocity
• Binary matter-wave compactons induced by inter-species scattering length modulations