High-Fidelity, Single-Shot, Quantum-Logic-Assisted Readout in a Mixed-Species Ion Chain

2017/06/15 by Colin Bruzewicz, Bruzewicz, Colin, Robert McConnell +11 · 1 citation
Chemical Engineering · Chemistry · Physics and Astronomy · #Analytical Chemistry and Sensors #Atomic Physics (physics.atom-ph) #Electrochemical Analysis and Applications #FOS: Physical sciences #Mass Spectrometry Techniques and Applications #Quantum Physics (quant-ph) #physics.atom-ph #quant-ph

paper · pdf · doi:10.48550/arxiv.1706.05102

5 pages, 4 figures

arxiv created 2017/06/15 · openalex publication_date 2017/06/15 · arxiv updated 2017/06/19 · openalex created_date 2017/06/23 · openalex updated_date 2026/07/28

Abstract

We use a co-trapped ion (⁸⁸Sr⁺) to sympathetically cool and measure the quantum state populations of a memory-qubit ion of a different atomic species (⁴⁰Ca⁺) in a cryogenic, surface-electrode ion trap. Due in part to the low motional heating rate demonstrated here, the state populations of the memory ion can be transferred to the auxiliary ion by using the shared motion as a quantum state bus and measured with an average accuracy of 96(1)%. This scheme can be used in quantum information processors to reduce photon-scattering-induced error in unmeasured memory qubits.

Cited by

• Repeated multi-qubit readout and feedback with a mixed-species trapped-ion register

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