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Fluxon interaction in an overdamped Josephson transmission line
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1995
Year
EngineeringJosephson JunctionsJosephson Transmission LineSuperconductivityElectric Power TransmissionFluxon InteractionSuperconducting DevicesElectronic CircuitQuantum ScienceElectrical EngineeringRsfq LogicPhysicsQuantum DevicePlasma InstabilityApplied PhysicsTransmission LineQuantum DevicesQuantum HardwareFluxon Propagation
We have simulated fluxon propagation within a Josephson transmission line that is one of the elements of a rapid single flux quantum (RSFQ) circuit. This line is a parallel connection of damped Josephson junctions coupled by superconducting inductances. Geometries with and without mutual inductances between neighboring cells are considered. If the time interval between two fluxons is less than 0.3 φ0Vc−1 (Vc characteristic voltage) a repulsion between them was observed. The repulsion sets a specific time delay between the fluxons that impose a rigid limitation for high frequency performance of RSFQ logic. The delay depends on the shunting parameter, bias current, and values of interconnecting inductances.