The authors study the frequency dependent damping in rapid single flux quantum (RSFQ) circuits as means to reduce dissipation and consequent decoherence in RSFQ/qubit circuits. They show by simulations and experiments that stable RSFQ operation can be achieved by shunting the Josephson junctions with an RC circuit instead of a plain resistor. The authors derive criteria for the stability of such an arrangement and discuss the effect on decoherence.
- quantum computing
- superconducting logic circuits
- Josephson junction
- Josephson junction arrays
Hassel, J., Helistö, P., Seppä, H., Kunert, J., Fritzsch, L., & Meyer, H-G. (2006). Rapid single flux quantum devices with selective dissipation for quantum information processing. Applied Physics Letters, 89(18). https://doi.org/10.1063/1.2382733