Quantum Phase Diffusions of a Spinor Condensate

S. Yi, Ö. E. Müstecaplıoğlu, L. You
2003 Physical Review Letters  
We discuss the quantum phases and their diffusion in a spinor-1 atomic Bose-Einstein condensate. For ferromagnetic interactions, we obtain the exact ground state distribution of the phase fluctuations corresponding to the total atom number ($N$), the magnetization (${\cal M}$), and the alignment (or hypercharge) ($Y$) of the system. The mean field ground state is shown to be stable against these fluctuations, which dynamically recover the two continuous symmetries associated with the
more » ... with the conservation of $N$ and ${\cal M}$ as in current experiments.
doi:10.1103/physrevlett.90.140404 pmid:12731901 fatcat:5cuplr4jirbt5pndpv2q2rleea