{"corpus_id":9107033,"paper_sha":"5a9a862fae528effa53f9a29a735af9ded2eb25d","doi":"10.1126/SCIENCE.1116955","arxiv_id":null,"pmid":16141370,"pmcid":null,"mag_id":2087965200,"dblp_id":null,"acl_id":null,"title":"Coherent Manipulation of Coupled Electron Spins in Semiconductor Quantum Dots","year":2005,"publication_date":"2005-09-30","venue":"Science","journal":{"name":"Science","pages":"2180 - 2184","volume":"309"},"journal_issn":null,"journal_title":null,"publication_types":["JournalArticle"],"pubmed_pub_types":["Journal Article"],"s2_fields_of_study":["Medicine","Physics"],"reference_count":37,"citation_count":2507,"influential_citation_count":77,"is_open_access":false,"arxiv_categories":null,"arxiv_license":null,"arxiv_journal_ref":null,"mesh_headings":null,"chemicals":null,"comments_corrections":null,"source_flags":5,"s2_open_access_pdf_url":null,"s2_open_access_landing_url":null,"s2_open_access_license":null,"s2_open_access_status":null,"pmc_open_access_pdf_url":null,"pmc_open_access_landing_url":null,"pmc_open_access_license":null,"pmc_open_access_status":null,"unpaywall_open_access_pdf_url":null,"unpaywall_open_access_landing_url":null,"unpaywall_open_access_license":null,"unpaywall_open_access_status":null,"abstract":"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. 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