High-fidelity readout of trapped-ion qubits.

Journal article

We demonstrate single-shot qubit readout with a fidelity sufficient for fault-tolerant quantum computation. For an optical qubit stored in 40Ca+ we achieve 99.991(1)% average readout fidelity in 10(6) trials, using time-resolved photon counting. An adaptive measurement technique allows 99.99% fidelity to be reached in 145 micros average detection time. For 43Ca+, we propose and implement an optical pumping scheme to transfer a long-lived hyperfine qubit to the optical qubit, capable of a theo...

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Authors: Myerson, A; Szwer, D; Webster, S; Allcock, D; Curtis, M

• Publication status: Published
• Journal: Physical Review Letters
• Volume: 100
• Issue: 20
• Pages: 200502
• Publication date: 2008-05-01
• DOI: 10.1103/physrevlett.100.200502
• EISSN: 1079-7114
• ISSN: 0031-9007
• Language: English
• Keywords: quant-ph