Coherent manipulation of coupled electron spins in semiconductor quantum dots.
We demonstrated coherent control of a quantum two-level system based on two-electron spin states in a double quantum dot, allowing state preparation, coherent manipulation, and projective readout. These techniques are based on rapid electrical control of the exchange interaction. Separating and late...
| Main Authors: | , , , , , , , , |
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| 格式: | Journal article |
| 语言: | English |
| 出版: |
2005
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| _version_ | 1826277187690430464 |
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| author | Petta, JR Johnson, A Taylor, J Laird, E Yacoby, A Lukin, MD Marcus, C Hanson, M Gossard, A |
| author_facet | Petta, JR Johnson, A Taylor, J Laird, E Yacoby, A Lukin, MD Marcus, C Hanson, M Gossard, A |
| author_sort | Petta, JR |
| collection | OXFORD |
| description | We demonstrated coherent control of a quantum two-level system based on two-electron spin states in a double quantum dot, allowing state preparation, coherent manipulation, and projective readout. These techniques are based on rapid electrical control of the exchange interaction. Separating and later recombining a singlet spin state provided a measurement of the spin dephasing time, T2*, of approximately 10 nanoseconds, limited by hyperfine interactions with the gallium arsenide host nuclei. Rabi oscillations of two-electron spin states were demonstrated, and spin-echo pulse sequences were used to suppress hyperfine-induced dephasing. Using these quantum control techniques, a coherence time for two-electron spin states exceeding 1 microsecond was observed. |
| first_indexed | 2024-03-06T23:25:08Z |
| format | Journal article |
| id | oxford-uuid:6a1c0f53-337f-4f64-9c4a-d85ceaee480c |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-06T23:25:08Z |
| publishDate | 2005 |
| record_format | dspace |
| spelling | oxford-uuid:6a1c0f53-337f-4f64-9c4a-d85ceaee480c2022-03-26T18:55:16ZCoherent manipulation of coupled electron spins in semiconductor quantum dots.Journal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:6a1c0f53-337f-4f64-9c4a-d85ceaee480cEnglishSymplectic Elements at Oxford2005Petta, JRJohnson, ATaylor, JLaird, EYacoby, ALukin, MDMarcus, CHanson, MGossard, AWe demonstrated coherent control of a quantum two-level system based on two-electron spin states in a double quantum dot, allowing state preparation, coherent manipulation, and projective readout. These techniques are based on rapid electrical control of the exchange interaction. Separating and later recombining a singlet spin state provided a measurement of the spin dephasing time, T2*, of approximately 10 nanoseconds, limited by hyperfine interactions with the gallium arsenide host nuclei. Rabi oscillations of two-electron spin states were demonstrated, and spin-echo pulse sequences were used to suppress hyperfine-induced dephasing. Using these quantum control techniques, a coherence time for two-electron spin states exceeding 1 microsecond was observed. |
| spellingShingle | Petta, JR Johnson, A Taylor, J Laird, E Yacoby, A Lukin, MD Marcus, C Hanson, M Gossard, A Coherent manipulation of coupled electron spins in semiconductor quantum dots. |
| title | Coherent manipulation of coupled electron spins in semiconductor quantum dots. |
| title_full | Coherent manipulation of coupled electron spins in semiconductor quantum dots. |
| title_fullStr | Coherent manipulation of coupled electron spins in semiconductor quantum dots. |
| title_full_unstemmed | Coherent manipulation of coupled electron spins in semiconductor quantum dots. |
| title_short | Coherent manipulation of coupled electron spins in semiconductor quantum dots. |
| title_sort | coherent manipulation of coupled electron spins in semiconductor quantum dots |
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