Directed motion of vortices in a current-driven Josephson junction network |
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Authors: | T Kawaguchi |
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Institution: | aDepartment of Mathematics and Physics, University of Yamanashi, 4-4-37 Takeda, Kofu 400-8510, Japan |
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Abstract: | Dynamics of directed motion of vortices in a Josephson junction network (JJN) with a ladder structure is studied using a numerical simulation. By applying spatial and temporal modulation of external bias currents, directed motion of vortices occurs in the absence of a ratchet-type asymmetric potential. In the present system, the asymmetry of the directed motion emerges as a dynamical effect due to the modulated bias current. Some dynamical effects such as mode-locking and vortex–antivortex excitation are relevant to the directed dynamics. We clarify the details of the directed motion of vortices in the JJN. |
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Keywords: | Josephson junction network Directed motion Vortex dynamics |
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