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Title: Stabilizing Rabi oscillation of a charge qubit via the atomic clock technique
Authors: Yu, D 
Landra, A
Kwek, L.C 
Amico, L 
Dumke, R 
Keywords: Atomic clocks
Charge qubits
Cooper-pair box
Feedback control methods
Gate capacitors
Low Frequency Fluctuations
Principal structures
Rabi oscillations
Superconducting circuit
Quantum computers
Issue Date: 2018
Publisher: Institute of Physics Publishing
Citation: Yu, D, Landra, A, Kwek, L.C, Amico, L, Dumke, R (2018). Stabilizing Rabi oscillation of a charge qubit via the atomic clock technique. New Journal of Physics 20 (2) : 23031. ScholarBank@NUS Repository.
Abstract: We propose a superconducting circuit-atom hybrid, where the Rabi oscillation of single excess Cooper pair in the island is stabilized via the common atomic clock technique. The noise in the superconducting circuit is mapped onto the voltage source which biases the Cooper-pair box via an inductor and a gate capacitor. The fast fluctuations of the gate charge are significantly suppressed by an inductor-capacitor resonator, leading to a long-relaxation-time Rabi oscillation. More importantly, the residual low-frequency fluctuations are further reduced by using the general feedback-control method, in which the voltage bias is stabilized via continuously measuring the dc-Stark-shift-induced atomic Ramsey signal. The stability and coherence time of the resulting charge-qubit Rabi oscillation are both enhanced. The principal structure of this Cooper-pair-box oscillator is studied in detail. © 2018 The Author(s). Published by IOP Publishing Ltd on behalf of Deutsche Physikalische Gesellschaft.
Source Title: New Journal of Physics
ISSN: 1367-2630
DOI: 10.1088/1367-2630/aaa643
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