Dynamics of Josephson junctions and single-flux-quantum networks with superconductor-insulator-normal metal junction shunts

Abstract

Within the framework of the microscopic model of tunneling, we modelled the behavior of the Josephson junction shunted by the Superconductor-Insulator-Normal metal (SIN) tunnel junction. We found that the electromagnetic impedance of the SIN junction yields both the frequency-dependent damping and dynamic reactance which leads to an increase in the effective capacitance of the circuit. We calculated the dc I-V curves and transient characteristics of these circuits and explained their quantitative differences to the curves obtained within the resistively shunted junction model. The correct operation of the basic single-flux-quanta circuits with such SIN-shunted junctions, i.e. the Josephson transmission line and the toggle flip-flop, have also been modelled.

arXiv comment8 pages incl. 7 figures

References in corpus (4)

• Quantum state engineering with Josephson-junction devices
• Manipulating the Quantum State of an Electrical Circuit
• Josephson charge-phase qubit with radio frequency readout: coupling and decoherence
• Josephson tunnel junctions with nonlinear damping for RSFQ-qubit circuit applications

Cited by in corpus (9)

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• Lifetime of the superconductive state in short and long Josephson junctions
• Josephson Flux Flow Oscillator: the Microscopic Tunneling Approach
• Discrete Dynamical Modeling and Analysis of the R-S Flip-Flop Circuit
• Subgap conductivity in SIN-junctions of high barrier transparency
• Single flux quantum circuits with damping based on dissipative transmission lines
• Verification of stable operation of rapid single flux quantum devices with selective dissipation
• Photonic Negative Differential Thermal Conductance Enabled by NIS Junctions