期刊
JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN
卷 87, 期 2, 页码 -出版社
PHYSICAL SOC JAPAN
DOI: 10.7566/JPSJ.87.023601
关键词
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资金
- KAKENHI from the Japan Society for the Promotion of Science [17K05549, 17H02938, 26870295, 26400371]
- Osaka City University (OCU)
- Grants-in-Aid for Scientific Research [17H02938, 26870295, 17K05554, 26400371, 16KT0127, 17K05549] Funding Source: KAKEN
We revisit the fundamental problem of the splitting instability of a doubly quantized vortex in uniform single-component superfluids at zero temperature. We analyze the system-size dependence of the excitation frequency of a doubly quantized vortex through large-scale simulations of the Bogoliubov-de Gennes equation, and find that the system remains dynamically unstable even in the infinite-system-size limit. Perturbation and semi-classical theories reveal that the splitting instability radiates a damped oscillatory phonon as an opposite counterpart of a quasi-normal mode.
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