Single flux quantum circuits with damping based on dissipative transmission lines

Details Single flux quantum circuits with damping based on dissipative transmission lines Single flux quantum circuits with damping based on dissipative transmission lines

2008-04-03

arxiv.org/abs/0804.0442v1

Supercond. Sci. Technol. v. 21 (2008) 125010

Physics

Condensed Matter

Superconductivity

6 pages incl. 6 figures

Scientific paper

10.1088/0953-2048/21/12/125010

We propose and demonstrate the functioning of a special Rapid Single Flux Quantum (RSFQ) circuit with frequency-dependent damping. This damping is achieved by shunting individual Josephson junctions by pieces of open-ended RC transmission lines. Our circuit includes a toggle flip-flop cell, Josephson transmission lines transferring single flux quantum pulses to and from this cell, as well as DC/SFQ and SFQ/DC converters. Due to the desired frequency-dispersion in the RC line shunts which ensures sufficiently low noise at low frequencies, such circuits are well-suited for integrating with the flux/phase Josephson qubit and enable its efficient control.

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