Quantum dynamics of a vortex in a small magnetic particle
Institute of Magnetism, 36-b Vernadskogo Blvd., Kyiv 03142, Ukraine
Institute of Physics of the National Academy of Sciences of Ukraine, 46 Nauki Ave., Kyiv 03028, Ukraine
Institute for Metal Physics, National Academy of Sciences of Ukraine, Kiev 03142, Ukraine pos Анотація:
Received December 28, 2009
Within the approach of collective variables based on the Thiele equation, an exact solution of the problem of quantum dynamics of vortex in a small circular magnetic particle is obtained. It is shown that the vortex dynamics in the circular magnetic particle may be used to create mesoscopic quantum systems with a pre-selected distribution energy level and to exert control over intensity of transitions between these levels by changing the particle geometry.
PACS: 75.10.Jm Quantized spin models, including quantum spin frustration; PACS: 75.45.+j Macroscopic quantum phenomena in magnetic systems; PACS: 03.75.Lm Tunneling, Josephson effect, Bose–Einstein condensates in periodic potentials, solitons, vortices, and topological excitations.
Key words: Thiele equation, quantum dynamics of a vortex, mesoscopic quantum systems.