Stabilizing Rabi Oscillation of a Charge Qubit via Atomic Clock Technique

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.

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References in corpus (6)

• Charge insensitive qubit design derived from the Cooper pair box
• Superconducting Circuits and Quantum Information
• Suppressing Charge Noise Decoherence in Superconducting Charge Qubits
• Quantum feedback control of a superconducting qubit: Persistent Rabi oscillations
• AC-Stark Shift and Dephasing of a Superconducting Qubit Strongly Coupled to a Cavity Field
• Thermal Casimir-Polder shifts in Rydberg atoms near metallic surfaces

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• Optically Tailored Trapping Geometries for Ultracold Atoms on a Type-II Superconducting Chip
• The design of an experimental platform for hybridization of atomic and superconducting quantum systems
• GHZ-like states in the Qubit-Qudit Rabi Model