2008/06/30 by Jun Song, Jun Liang Song, Fei Zhou
Physics and Astronomy · #Cold Atom Physics and Bose-Einstein Condensates #Physics of Superconductivity and Magnetism #Quantum, superfluid, helium dynamics #cond-mat.other
paper · pdf · doi:10.1209/0295-5075/85/20002
published as Europhysics Letters 85, 20002 (2009). · 5 pages, 2 figures; revised version accepted by Europhysics Letters
openalex publication_date 2009/01/01 · arxiv created 2009/01/12 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/30
We have studied spin structures of fluctuation-driven fractionalized vortices and topological spin order in 2D nematic superfluids of cold sodium atoms. Our Monte Carlo simulations suggest a softened π-spin disclination structure in a half-quantum vortex when spin correlations are short ranged; in addition, calculations indicate that a unique non-local topological spin order emerges simultaneously as cold atoms become a superfluid below a critical temperature. We have also estimated fluctuation-dependent critical frequencies for half-quantum vortex nucleation in rotating optical traps and discussed probing these excitations in experiments.