Objective
This project links scientists from Russia, Ukraine, Belarus, and from five INTAS member states in investigating distributed superconducting structures consisting of continuous Josephson transmission lines (JTLs) as well as of planar arrays of small Josephson tunnel junctions.
A systematic experimental and numerical study of Josephson dynamics in continuum and in discrete media will be performed. Due to the non-linearity of the basic equation, the perturbed sine-Gordon equation, which describes the dynamic behaviour of Josephson junctions, many interesting excitations, such as magnetic flux quanta (fluxons) which behave like solitons, are present in JTLs based on both low-Tc and the high-Tc superconductors. Such a concept of localized kink excitations has not been sufficiently explored so far for discrete structures like Josephson junction arrays.
Due to the presence of these excitations the electromagnetic waves generated inside JTLs as well as in arrays give rise to temporal and spatial structures which will be investigated experimentally and theoretically. The phase-locking of flux flow in a JTL by an external force as well as intrinsic physical mechanisms of mutual phase-locking in junction arrays will be studied. Both JTL and array devices will be characterized for the purpose of millimetre and submillimetre electromagnetic wave applications.
Topic(s)
Call for proposal
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52405 Jülich
Germany