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Rapid single flux quantum devices with selective dissipation for quantum information processing

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6 Author(s)
Hassel, J. ; VTT Technical Research Centre of Finland, P.O. Box 1000, FIN-02044 VTT, Finland ; Helisto, P. ; Seppa, H. ; Kunert, J.
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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.

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Applied Physics Letters  (Volume:89 ,  Issue: 18 )