RSFQ devices with selective dissipation for quantum information processing

Abstract

We study the possibility to use frequency dependent damping in RSFQ circuits as means to reduce dissipation and consequent decoherence in RSFQ/qubit circuits. We show that stable RSFQ operation can be achieved by shunting the Josephson junctions with an $RC$ circuit instead of a plain resistor. We derive criteria for the stability of such an arrangement, and discuss the effect on decoherence and the optimisation issues. We also design a simple flux generator aimed at manipulating flux qubits.

References in corpus (8)

• Quantum state engineering with Josephson-junction devices
• Manipulating the Quantum State of an Electrical Circuit
• Coherent Quantum Dynamics of a Superconducting Flux Qubit
• Decoherence of flux qubits due to 1/f flux noise
• Flux Qubits and Readout Device with Two Independent Flux Lines
• Characterization of a fabrication process for the integration of superconducting qubits and RSFQ circuits
• High resolution superconducting single flux quantum comparator for sub kelvin temperatures
• Josephson tunnel junctions with nonlinear damping for RSFQ-qubit circuit applications

Cited by in corpus (4)

• Quantum--Classical Interface Based on Single Flux Quantum Digital Logic
• Reading-out the state of a flux qubit by Josephson transmission line solitons
• Single flux quantum circuits with damping based on dissipative transmission lines
• Verification of stable operation of rapid single flux quantum devices with selective dissipation