Roton immiscibility in a two-component dipolar Bose gas

Abstract

We characterize the immiscibility-miscibility transition (IMT) of a two-component Bose-Einstein condensate (BEC) with dipole-dipole interactions. In particular, we consider the quasi-two dimensional geometry, where a strong trapping potential admits only zero-point motion in the trap direction, while the atoms are more free to move in the transverse directions. We employ the Bogoliubov treatment of the two-component system to identify both the well-known long-wavelength IMT in addition to a roton-like IMT, where the transition occurs at finite-wave number and is reminiscent of the roton softening in the single component dipolar BEC. Additionally, we verify the existence of the roton IMT in the fully trapped, finite systems by direct numerical simulation of the two-component coupled non-local Gross-Pitaevskii equations.

13 pages, 2 columns, 9 figures

References in corpus (13)

• A High Phase-Space-Density Gas of Polar Molecules
• Bose-Einstein condensation of chromium
• Spontaneous symmetry breaking in a quenched ferromagnetic spinor Bose condensate
• Bose-Einstein Condensation of Erbium
• Stabilizing a purely dipolar quantum gas against collapse
• d-wave collapse and explosion of a dipolar Bose-Einstein condensate
• Spontaneously modulated spin textures in a dipolar spinor Bose-Einstein condensate
• Stability of quasi-two-dimensional Bose-Einstein condensates with dominant dipole-dipole interactions
• Production of a dual-species Bose-Einstein condensate of Rb and Cs atoms
• Controlling phase separation of a two-component Bose-Einstein condensate by confinement
• Faraday waves in binary non-miscible Bose-Einstein condensates
• Dynamical pattern formation during growth of a dual-species Bose-Einstein condensate
• Phase separation of a two-component dipolar Bose-Einstein condensate in the quasi-one-dimensional and quasi-two-dimensional regime

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