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Flows With Fractional Quantum Circulation In Bose-einstein Condensates Induced By Nontopological Phase Defects

Title: Flows With Fractional Quantum Circulation In Bose-einstein Condensates Induced By Nontopological Phase Defects.
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Name(s): Kanai, Toshiaki, author
Guo, Wei, author
Tsubota, Makoto, author
Type of Resource: text
Genre: Journal Article
Text
Journal Article
Date Issued: 2018-01-16
Physical Form: computer
online resource
Extent: 1 online resource
Language(s): English
Abstract/Description: It is a common view that rotational motion in a superfluid can exist only in the presence of topological defects, i.e., quantized vortices. However, in our numerical studies on the merging of two concentric Bose-Einstein condensates with axial symmetry in two-dimensional space, we observe the emergence of a spiral dark soliton when one condensate has a nonzero initial angular momentum. This spiral dark soliton enables the transfer of angular momentum between the condensates and allows the merged condensate to rotate even in the absence of quantized vortices. Our examination of the flow field around the soliton strikingly reveals that its sharp endpoint can induce flow like a vortex point but with a fraction of a quantized circulation. This interesting nontopological "phase defect" may generate broad interest since rotational motion is essential in many quantum transport processes.
Identifier: FSU_libsubv1_wos_000423107800023 (IID), 10.1103/PhysRevA.97.013612 (DOI)
Keywords: transition, waves, vortices
Publication Note: The publisher's version of record is available at https://doi.org/10.1103/PhysRevA.97.013612
Persistent Link to This Record: http://purl.flvc.org/fsu/fd/FSU_libsubv1_wos_000423107800023
Owner Institution: FSU
Is Part Of: Physical Review A.
2469-9926
Issue: iss. 1, vol. 97

Choose the citation style.
Kanai, T., Guo, W., & Tsubota, M. (2018). Flows With Fractional Quantum Circulation In Bose-einstein Condensates Induced By Nontopological Phase Defects. Physical Review A. Retrieved from http://purl.flvc.org/fsu/fd/FSU_libsubv1_wos_000423107800023