Coherent spin manipulation in an exchange-only qubit
Initialization, two-spin coherent manipulation, and readout of a three-spin qubit are demonstrated using a few-electron triple quantum dot. The three-spin qubit is designed to allow all operations for full qubit control to be tuned via nearest-neighbor exchange interaction. Fast readout of charge st...
| Hoofdauteurs: | , , , , , |
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| Formaat: | Journal article |
| Taal: | English |
| Gepubliceerd in: |
2010
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| _version_ | 1826289636433985536 |
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| author | Laird, E Taylor, J DiVincenzo, D Marcus, C Hanson, M Gossard, A |
| author_facet | Laird, E Taylor, J DiVincenzo, D Marcus, C Hanson, M Gossard, A |
| author_sort | Laird, E |
| collection | OXFORD |
| description | Initialization, two-spin coherent manipulation, and readout of a three-spin qubit are demonstrated using a few-electron triple quantum dot. The three-spin qubit is designed to allow all operations for full qubit control to be tuned via nearest-neighbor exchange interaction. Fast readout of charge states takes advantage of multiplexed reflectometry. Decoherence measured in a two-spin subspace is found to be consistent with predictions based on gate voltage noise with a uniform power spectrum. The theory of the exchange-only qubit is developed and it is shown that initialization of only two spins suffices for operation. Requirements for full multiqubit control using only exchange and electrostatic interactions are outlined. © 2010 The American Physical Society. |
| first_indexed | 2024-03-07T02:31:54Z |
| format | Journal article |
| id | oxford-uuid:a784754c-99d4-4337-a4df-b75a42dea0a7 |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-07T02:31:54Z |
| publishDate | 2010 |
| record_format | dspace |
| spelling | oxford-uuid:a784754c-99d4-4337-a4df-b75a42dea0a72022-03-27T02:55:12ZCoherent spin manipulation in an exchange-only qubitJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:a784754c-99d4-4337-a4df-b75a42dea0a7EnglishSymplectic Elements at Oxford2010Laird, ETaylor, JDiVincenzo, DMarcus, CHanson, MGossard, AInitialization, two-spin coherent manipulation, and readout of a three-spin qubit are demonstrated using a few-electron triple quantum dot. The three-spin qubit is designed to allow all operations for full qubit control to be tuned via nearest-neighbor exchange interaction. Fast readout of charge states takes advantage of multiplexed reflectometry. Decoherence measured in a two-spin subspace is found to be consistent with predictions based on gate voltage noise with a uniform power spectrum. The theory of the exchange-only qubit is developed and it is shown that initialization of only two spins suffices for operation. Requirements for full multiqubit control using only exchange and electrostatic interactions are outlined. © 2010 The American Physical Society. |
| spellingShingle | Laird, E Taylor, J DiVincenzo, D Marcus, C Hanson, M Gossard, A Coherent spin manipulation in an exchange-only qubit |
| title | Coherent spin manipulation in an exchange-only qubit |
| title_full | Coherent spin manipulation in an exchange-only qubit |
| title_fullStr | Coherent spin manipulation in an exchange-only qubit |
| title_full_unstemmed | Coherent spin manipulation in an exchange-only qubit |
| title_short | Coherent spin manipulation in an exchange-only qubit |
| title_sort | coherent spin manipulation in an exchange only qubit |
| work_keys_str_mv | AT lairde coherentspinmanipulationinanexchangeonlyqubit AT taylorj coherentspinmanipulationinanexchangeonlyqubit AT divincenzod coherentspinmanipulationinanexchangeonlyqubit AT marcusc coherentspinmanipulationinanexchangeonlyqubit AT hansonm coherentspinmanipulationinanexchangeonlyqubit AT gossarda coherentspinmanipulationinanexchangeonlyqubit |