Dynamical instability and domain formation in a spin-1 Bose condensate

Details Dynamical instability and domain formation in a spin-1 Bose condensate Dynamical instability and domain formation in a spin-1 Bose condensate

2005-09-21

arxiv.org/abs/cond-mat/0509549v1

Phys. Rev. Lett. 95, 180403 (2005)

Physics

Condensed Matter

Other Condensed Matter

RevTex4, 4 pages with 3 color eps figure, to appear in Phys. Rev. Lett

Scientific paper

10.1103/PhysRevLett.95.180403

We interpret the recently observed spatial domain formation in spin-1 atomic condensates as a result of dynamical instability. Within the mean field theory, a homogeneous condensate is dynamically unstable (stable) for ferromagnetic (antiferromagnetic) atomic interactions. We find this dynamical instability naturally leads to spontaneous domain formation as observed in several recent experiments for condensates with rather small numbers of atoms. For trapped condensates, our numerical simulations compare quantitatively to the experimental results, thus largely confirming the physical insight from our analysis of the homogeneous case.

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