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High-fidelity readout of trapped-ion qubits.

Abstract:

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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Publication status:
Published

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Journal:
Physical review letters
Volume:
100
Issue:
20
Pages:
200502
Publication date:
2008-05-05
DOI:
EISSN:
1079-7114
ISSN:
0031-9007
URN:
uuid:ba0e9342-4292-45fc-a72e-a240576b3e48
Source identifiers:
20578
Local pid:
pubs:20578
Language:
English
Keywords:

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