Stabilized parametric Cooper-pair pumping in a linear array of coupled Josephson junctions

Abstract

We present an experimentally realizable stabilized charge pumping scheme in a linear array of Cooper-pair boxes. The system design intrinsically protects the pumping mechanism from severe errors, especially current reversal and spontaneous charge excitation. The quantum Zeno effect is implemented to further diminish pumping errors. The characteristics of this scheme are considered from the perspective of improving the current standard. Such an improvement bears relevence to the closure of the so-called measurement triangle (see D. Averin [Nature 434, 285 (2005)]).

Title changed, other corrections and modifications requested from Phys. Rev. Lett

References in corpus (5)

• Quantum state engineering with Josephson-junction devices
• Josephson-Junction Qubits with Controlled Couplings
• Adiabatic transport of Cooper pairs in arrays of Josephson junctions
• Evidence of Cooper pair pumping with combined flux and voltage control
• Turnstile behaviour of the Cooper-pair pump

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• Coherent Cooper-pair pumping by magnetic flux control
• Optimized Cooper pair pumps
• Quantum effect of inductance on geometric Cooper-pair transport
• Adiabatic Cooper-Pair Pumping in a Linear Array of Cooper Pair Boxes