High-fidelity spatial addressing of Ca-43 qubits using near-field microwave control
Individual addressing of qubits is essential for scalable quantum computation. Spatial addressing allows unlimited numbers of qubits to share the same frequency, whilst enabling arbitrary parallel operations. We demonstrate addressing of long-lived $^{43}\text{Ca}^+$ "atomic clock" qubits...
| Main Authors: | , , , , , , , , |
|---|---|
| Format: | Journal article |
| Published: |
2016
|
| _version_ | 1826292295713947648 |
|---|---|
| author | Craik, D Linke, N Sepiol, M Harty, T Ballance, C Stacey, D Steane, A Lucas, D Allcock, D |
| author_facet | Craik, D Linke, N Sepiol, M Harty, T Ballance, C Stacey, D Steane, A Lucas, D Allcock, D |
| author_sort | Craik, D |
| collection | OXFORD |
| description | Individual addressing of qubits is essential for scalable quantum computation. Spatial addressing allows unlimited numbers of qubits to share the same frequency, whilst enabling arbitrary parallel operations. We demonstrate addressing of long-lived $^{43}\text{Ca}^+$ "atomic clock" qubits held in separate zones of a microfabricated surface trap with integrated microwave electrodes. By coherently cancelling the microwave field in one zone we measure a ratio of Rabi frequencies between addressed and non-addressed qubits of up to 1400, implying an addressing error of $1.3\times 10^{-6}$. Off-resonant excitation prevents this error level being directly demonstrated, but we also show polarization control of the microwave field with error $2\times 10^{-5}$, sufficient to suppress off-resonant excitation out of the qubit states to the $\sim 10^{-9}$ level. Such polarization control could enable fast microwave operations. |
| first_indexed | 2024-03-07T03:12:29Z |
| format | Journal article |
| id | oxford-uuid:b4a831f4-e291-499a-a07e-929823faa0f3 |
| institution | University of Oxford |
| last_indexed | 2024-03-07T03:12:29Z |
| publishDate | 2016 |
| record_format | dspace |
| spelling | oxford-uuid:b4a831f4-e291-499a-a07e-929823faa0f32022-03-27T04:27:52ZHigh-fidelity spatial addressing of Ca-43 qubits using near-field microwave controlJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:b4a831f4-e291-499a-a07e-929823faa0f3Symplectic Elements at Oxford2016Craik, DLinke, NSepiol, MHarty, TBallance, CStacey, DSteane, ALucas, DAllcock, DIndividual addressing of qubits is essential for scalable quantum computation. Spatial addressing allows unlimited numbers of qubits to share the same frequency, whilst enabling arbitrary parallel operations. We demonstrate addressing of long-lived $^{43}\text{Ca}^+$ "atomic clock" qubits held in separate zones of a microfabricated surface trap with integrated microwave electrodes. By coherently cancelling the microwave field in one zone we measure a ratio of Rabi frequencies between addressed and non-addressed qubits of up to 1400, implying an addressing error of $1.3\times 10^{-6}$. Off-resonant excitation prevents this error level being directly demonstrated, but we also show polarization control of the microwave field with error $2\times 10^{-5}$, sufficient to suppress off-resonant excitation out of the qubit states to the $\sim 10^{-9}$ level. Such polarization control could enable fast microwave operations. |
| spellingShingle | Craik, D Linke, N Sepiol, M Harty, T Ballance, C Stacey, D Steane, A Lucas, D Allcock, D High-fidelity spatial addressing of Ca-43 qubits using near-field microwave control |
| title | High-fidelity spatial addressing of Ca-43 qubits using near-field
microwave control |
| title_full | High-fidelity spatial addressing of Ca-43 qubits using near-field
microwave control |
| title_fullStr | High-fidelity spatial addressing of Ca-43 qubits using near-field
microwave control |
| title_full_unstemmed | High-fidelity spatial addressing of Ca-43 qubits using near-field
microwave control |
| title_short | High-fidelity spatial addressing of Ca-43 qubits using near-field
microwave control |
| title_sort | high fidelity spatial addressing of ca 43 qubits using near field microwave control |
| work_keys_str_mv | AT craikd highfidelityspatialaddressingofca43qubitsusingnearfieldmicrowavecontrol AT linken highfidelityspatialaddressingofca43qubitsusingnearfieldmicrowavecontrol AT sepiolm highfidelityspatialaddressingofca43qubitsusingnearfieldmicrowavecontrol AT hartyt highfidelityspatialaddressingofca43qubitsusingnearfieldmicrowavecontrol AT ballancec highfidelityspatialaddressingofca43qubitsusingnearfieldmicrowavecontrol AT staceyd highfidelityspatialaddressingofca43qubitsusingnearfieldmicrowavecontrol AT steanea highfidelityspatialaddressingofca43qubitsusingnearfieldmicrowavecontrol AT lucasd highfidelityspatialaddressingofca43qubitsusingnearfieldmicrowavecontrol AT allcockd highfidelityspatialaddressingofca43qubitsusingnearfieldmicrowavecontrol |