Spin mixing and protection of ferromagnetism in a spinor dipolar condensate

Abstract

We study spin mixing dynamics in a chromium dipolar Bose-Einstein Condensate, after tilting the atomic spins by an angle $\theta$ with respect to the magnetic field. Spin mixing is triggered by dipolar coupling, but, once dynamics has started, it is mostly driven by contact interactions. For the particular case $\theta =\pi /2$, an external spin-orbit coupling term induced by a magnetic gradient is required to enable the dynamics. Then the initial ferromagnetic character of the gas is locally preserved, an unexpected feature that we attribute to large spin-dependent contact interactions.

arXiv comment4 figures (+2 figures in Supp Mat)

References in corpus (18)

• Spinor Bose-Einstein condensates
• Realizing a lattice spin model with polar molecules
• Electron spin coherence exceeding seconds in high purity silicon
• Dynamics and statistical mechanics of ultra-cold Bose gases using c-field techniques
• Spontaneously modulated spin textures in a dipolar spinor Bose-Einstein condensate
• Spin self-rephasing and very long coherence times in a trapped atomic ensemble
• Observation of Feshbach resonances in an ultracold gas of ${}^{52}$Cr
• Spontaneous demagnetization of a dipolar spinor Bose gas at ultra-low magnetic field
• Far from equilibrium quantum magnetism with ultracold polar molecules
• Control of dipolar relaxation in external fields
• Spontaneous pattern formation in an anti-ferromagnetic quantum gas
• Can Spinor Dipolar Effects be Observed in Bose-Einstein Condensates?
• Cumulative identical spin rotation effects in collisionless trapped atomic gases
• Probing spin dynamics from the Mott insulating to the superfluid regime in a dipolar lattice gas
• Hydrodynamic equation of a spinor dipolar Bose-Einstein condensate
• Competition between Bose Einstein Condensation and spin dynamics
• Parametric amplification of matter waves in dipolar spinor Bose-Einstein condensates
• Dipolar atomic spin ensembles in a double-well potential

Cited by in corpus (8)

• Dipolar physics: A review of experiments with magnetic quantum gases
• Exploring out-of-equilibrium quantum magnetism and thermalization in a spin-3 many-body dipolar lattice system
• Bose-Einstein Condensation of Europium
• Relaxation of the collective magnetization of a dense 3D array of interacting dipolar S=3 atoms
• Continuous protection of a collective state from inhomogeneous dephasing
• Collective spin modes of a trapped quantum ferrofluid
• Dynamics of an itinerant spin-3 atomic dipolar gas in an optical lattice
• Two ultracold highly magnetic atoms in a one-dimensional harmonic trap