Magnetic phase diagram of a spin-1 condensate in two dimensions with dipole interaction

Abstract

Several new features arise in the ground-state phase diagram of a spin-1 condensate trapped in an optical trap when the magnetic dipole interaction between the atoms is taken into account along with confinement and spin precession. The boundaries between the regions of ferromagnetic and polar phases move as the dipole strength is varied and the ferromagnetic phases can be modulated. The magnetization of the ferromagnetic phase perpendicular to the field becomes modulated as a helix winding around the magnetic field direction, with a wavelength inversely proportional to the dipole strength. This modulation should be observable for current experimental parameters in ${}^{87}$Rb. Hence the much-sought supersolid state, with broken continuous translation invariance in one direction and broken global U(1) invariance, occurs generically as a metastable state in this system as a result of dipole interaction. The ferromagnetic state parallel to the applied magnetic field becomes striped in a finite system at strong dipolar coupling.

11 pages, 7 figures;published version

References in corpus (7)

• Bose-Einstein condensation of chromium
• Spontaneous symmetry breaking in a quenched ferromagnetic spinor Bose condensate
• Spontaneously modulated spin textures in a dipolar spinor Bose-Einstein condensate
• Topological defects and the superfluid transition of the $s=1$ spinor condensate in two dimensions
• Long wavelength spin dynamics of ferromagnetic condensates
• Dynamical models and the phase ordering kinetics of the s=1 spinor condensate
• Spontaneous Vortex Lattices in Quasi 2D Dipolar Spinor Condensates

Cited by in corpus (5)

• Spinor Bose-Einstein condensates
• Long timescale dynamics of spin textures in a degenerate F=1 ${}^{87}$ Rb spinor Bose gas
• Dipolar and spinor bosonic systems
• Spontaneous Magnetic Ordering in a Ferromagnetic Spinor Dipolar Bose-Einstein Condensate
• Optical-plug-assisted spin vortex in a ${}^{87}$Rb dipolar spinor Bose-Einstein condensate