High-fidelity readout of trapped-ion qubits.
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% fideli...
| Main Authors: | , , , , , , , , , |
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| Format: | Journal article |
| Language: | English |
| Published: |
2008
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| _version_ | 1797091161426362368 |
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| author | Myerson, A Szwer, D Webster, S Allcock, D Curtis, M Imreh, G Sherman, J Stacey, D Steane, A Lucas, D |
| author_facet | Myerson, A Szwer, D Webster, S Allcock, D Curtis, M Imreh, G Sherman, J Stacey, D Steane, A Lucas, D |
| author_sort | Myerson, A |
| collection | OXFORD |
| description | 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 theoretical fidelity of 99.95% in 10 micros. We achieve 99.87(4)% transfer fidelity and 99.77(3)% net readout fidelity. |
| first_indexed | 2024-03-07T03:29:04Z |
| format | Journal article |
| id | oxford-uuid:ba0e9342-4292-45fc-a72e-a240576b3e48 |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-07T03:29:04Z |
| publishDate | 2008 |
| record_format | dspace |
| spelling | oxford-uuid:ba0e9342-4292-45fc-a72e-a240576b3e482022-03-27T05:07:23ZHigh-fidelity readout of trapped-ion qubits.Journal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:ba0e9342-4292-45fc-a72e-a240576b3e48EnglishSymplectic Elements at Oxford2008Myerson, ASzwer, DWebster, SAllcock, DCurtis, MImreh, GSherman, JStacey, DSteane, ALucas, DWe 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 theoretical fidelity of 99.95% in 10 micros. We achieve 99.87(4)% transfer fidelity and 99.77(3)% net readout fidelity. |
| spellingShingle | Myerson, A Szwer, D Webster, S Allcock, D Curtis, M Imreh, G Sherman, J Stacey, D Steane, A Lucas, D High-fidelity readout of trapped-ion qubits. |
| title | High-fidelity readout of trapped-ion qubits. |
| title_full | High-fidelity readout of trapped-ion qubits. |
| title_fullStr | High-fidelity readout of trapped-ion qubits. |
| title_full_unstemmed | High-fidelity readout of trapped-ion qubits. |
| title_short | High-fidelity readout of trapped-ion qubits. |
| title_sort | high fidelity readout of trapped ion qubits |
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