Collisional Dynamics of Half-Quantum Vortices in a Spinor Bose-Einstein Condensate

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Title
Collisional Dynamics of Half-Quantum Vortices in a Spinor Bose-Einstein Condensate
Author(s)
Sang Won Seo; Woo Jin Kwon; Seji Kang; Yongil Shin
Publication Date
2016-05
Journal
PHYSICAL REVIEW LETTERS, v.116, no.18, pp.185301 -
Publisher
AMER PHYSICAL SOC
Abstract
We present an experimental study on the interaction and dynamics of half-quantum vortices (HQVs) in an antiferromagnetic spinor Bose-Einstein condensate. By exploiting the orbit motion of a vortex dipole in a trapped condensate, we perform a collision experiment of two HQV pairs, and observe that the scattering motions of the HQVs is consistent with the short-range vortex interaction that arises from nonsingular magnetized vortex cores. We also investigate the relaxation dynamics of turbulent condensates containing many HQVs, and demonstrate that spin wave excitations are generated by the collisional motions of the HQVs. The short-range vortex interaction and the HQV-magnon coupling represent two characteristics of the HQV dynamics in the spinor superfluid. © 2016 American Physical Society
URI
https://pr.ibs.re.kr/handle/8788114/3065
ISSN
0031-9007
Appears in Collections:
Center for Correlated Electron Systems(강상관계 물질 연구단) > Journal Papers (저널논문)
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