Superfluid vortex dynamics on a torus and other toroidal surfaces of revolution
The superfluid flow velocity is proportional to the gradient of the phase of the superfluid order parameter, leading to the quantization of circulation around a vortex core. In this work, we study the dynamics of a superfluid film on the surface of a torus. Such a compact surface allows only configu...
| Autores: | , , |
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| Tipo de recurso: | artículo |
| Fecha de publicación: | 2020 |
| País: | España |
| Institución: | Universitat Politècnica de Catalunya (UPC) |
| Repositorio: | UPCommons. Portal del coneixement obert de la UPC |
| Idioma: | inglés |
| OAI Identifier: | oai:upcommons.upc.edu:2117/345362 |
| Acceso en línea: | https://hdl.handle.net/2117/345362 https://dx.doi.org/10.1103/PhysRevA.101.053606 |
| Access Level: | acceso abierto |
| Palabra clave: | Superfluidity Fluid dynamics Vortex-motion Vortex dynamics Dinàmica de fluids Vòrtexs (Hidrodinàmica) Superfluïdesa Àrees temàtiques de la UPC::Física |
| Sumario: | The superfluid flow velocity is proportional to the gradient of the phase of the superfluid order parameter, leading to the quantization of circulation around a vortex core. In this work, we study the dynamics of a superfluid film on the surface of a torus. Such a compact surface allows only configurations of vortices with zero net vorticity. We derive analytic expressions for the flow field, the total energy, and the time-dependent dynamics of the vortex cores. The local curvature of the torus and the presence of non-contractable loops on this multiply connected surface alter both the superfluid flow and the vortex dynamics. Finally we consider more general surfaces of revolution, called toroids |
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