156 citations · 947 across the 17 of their papers we have counts for
17 papers
Observation of wall-vortex composite defects in a spinor Bose-Einstein condensate
Seji Kang, Sang Won Seo, Hiromitsu Takeuchi +1
We report the observation of spin domain walls bounded by half-quantum vortices (HQVs) in a spin-1 Bose-Einstein condensate with antiferromagnetic interactions. A spinor condensate…
Critical spin superflow in a spinor Bose-Einstein condensate
Joon Hyun Kim, Sang Won Seo, Yong-il Shin
We investigate the critical dynamics of spin superflow in an easy-plane antiferromagnetic spinor Bose-Einstein condensate. Spin-dipole oscillations are induced in a trapped condens…
Emergence and scaling of spin turbulence in quenched antiferromagnetic spinor Bose-Einstein condensates
Seji Kang, Sang Won Seo, Joon Hyun Kim +1
We investigate the phase transition dynamics of a quasi-2D antiferromagnetic spin-1 Bose-Einstein condensate from the easy-axis polar phase to the easy-plane polar phase, which is…
Observation of vortex-antivortex pairing in decaying 2D turbulence of a superfluid gas
Sang Won Seo, Bumsuk Ko, Joon Hyun Kim +1
In a two-dimensional (2D) classical fluid, a large-scale flow structure emerges out of turbulence, which is known as the inverse energy cascade where energy flows from small to lar…
Observation of von Kármán Vortex Street in an Atomic Superfluid Gas
Woo Jin Kwon, Joon Hyun Kim, Sang Won Seo +1
We report on the experimental observation of vortex cluster shedding from a moving obstacle in an oblate atomic Bose-Einstein condensate. At low obstacle velocities above a cri…
Optical pumping effect in absorption imaging of F=1 atomic gases
Sooshin Kim, Sang Won Seo, Heung-Ryoul Noh +1
We report our study of the optical pumping effect in absorption imaging of Na atoms in the hyperfine spin states. Solving a set of rate equations for the spin populati…