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arXiv · 0804.0442

Single flux quantum circuits with damping based on dissipative transmission lines

E. M. Tolkacheva·D. V. Balashov·M. I. Khabipov·A. B. Zorin
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Abstract

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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E. M. Tolkacheva, D. V. Balashov, M. I. Khabipov, A. B. Zorin. 2008-04-03. Single flux quantum circuits with damping based on dissipative transmission lines. https://doi.org/10.1088/0953-2048%2F21%2F12%2F125010

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