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% fidelit...
| Հիմնական հեղինակներ: | , , , , , , , , , |
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| Ձևաչափ: | Journal article |
| Լեզու: | English |
| Հրապարակվել է: |
American Physical Society
2008
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| Խորագրեր: |
| _version_ | 1826287910470549504 |
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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 μs 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 μs. We achieve 99.87(4)% transfer fidelity and 99.77(3)% net readout fidelity. |
| first_indexed | 2024-03-07T02:05:46Z |
| format | Journal article |
| id | oxford-uuid:9ef291a6-a3c8-4f69-a7a7-031dd696b15d |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-07T02:05:46Z |
| publishDate | 2008 |
| publisher | American Physical Society |
| record_format | dspace |
| spelling | oxford-uuid:9ef291a6-a3c8-4f69-a7a7-031dd696b15d2022-03-27T00:53:44ZHigh-fidelity readout of trapped-ion qubitsJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:9ef291a6-a3c8-4f69-a7a7-031dd696b15dPhysicsAtomic and laser physicsEnglishOxford University Research Archive - ValetAmerican Physical Society2008Myerson, 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 μs 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 μs. We achieve 99.87(4)% transfer fidelity and 99.77(3)% net readout fidelity. |
| spellingShingle | Physics Atomic and laser physics 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 |
| topic | Physics Atomic and laser physics |
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