Annihilation of vortex lines in rotating superfluid3He
| Autor: | Wen Xu, Matti Krusius, V. M. H. Ruutu, Edouard Sonin, J. J. Ruohio, Bernard Plaçais |
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| Rok vydání: | 1997 |
| Předmět: | |
| Zdroj: | Physical Review B. 56:14089-14092 |
| ISSN: | 1095-3795 0163-1829 |
| Popis: | In decelerating rotation, vortex lines annihilate in single-vortex events at the annihilation threshold where their number ${N}_{\mathrm{}\mathrm{max}}(\ensuremath{\Omega})$ is equal to or exceeds the equilibrium value ${N}_{\mathrm{}\mathrm{eq}}(\ensuremath{\Omega})$. A surplus ${N}_{\mathrm{max}}\ensuremath{-}{N}_{\mathrm{eq}}$ may be stabilized by an energy barrier, which during deceleration vanishes in an instability. We find the barrier to depend on container misalignment in ${}^{3}\mathrm{H}\mathrm{e}\ensuremath{-}B$ and on the orbital texture in the container corners in ${}^{3}\mathrm{H}\mathrm{e}\ensuremath{-}A$. Measurements of the instability yield the circulation quantum of the vortex which is found to be consistent with the present identification of vortex structures in ${}^{3}\mathrm{H}\mathrm{e}\ensuremath{-}A$. |
| Databáze: | OpenAIRE |
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