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Exact Vortex Clusters of Two-Dimensional Quantum Fluid with Harmonic Confinement |
| CHONG Gui-Shu1**, ZHANG Ling-Ling1, HAI Wen-Hua2 |
1School of Physics and Microelectronics, Hunan University, Changsha 410082
2Department of Physics and Key Laboratory of Low-Dimensional Quantum Structure and Quantum Control of Ministry of Education, Hunan Normal University, Changsha 410081
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| Cite this article: |
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CHONG Gui-Shu, ZHANG Ling-Ling, HAI Wen-Hua 2013 Chin. Phys. Lett. 30 040303 |
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Abstract A family of exact analytical solutions of vortices in quantum fluid governed by a two-dimensional time-dependent Schr?dinger equation is presented, which describes different kinds of vortex structures. The dynamics of different vortex clusters, such as the single vortex, vortex pair, vortex dipole and vortex trimer in a two-dimensional quantum fluid are analytically studied based on these exact solutions. The time evolutions of the wave of such vortices are demonstrated, and the orbits of motion of singular points in the vortices are also explored. The interactions of vortices in many-vortex clusters are discussed. A repulsive interaction between vortices with the same topological charge, and inter-annihilation and inter-creation of vortices with opposite topological charge, are shown.
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Received: 25 December 2012
Published: 28 April 2013
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| PACS: |
03.75.Lm
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(Tunneling, Josephson effect, Bose-Einstein condensates in periodic potentials, solitons, vortices, and topological excitations)
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67.10.Jn
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(Transport properties and hydrodynamics)
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67.10.Hk
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(Quantum effects on the structure and dynamics of non-degenerate fluids)
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47.32.C-
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(Vortex dynamics)
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