2015 Fiscal Year Final Research Report
Quantum state transfer from a photon to an electron spin in a quantum dot
Project/Area Number |
24244044
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Research Category |
Grant-in-Aid for Scientific Research (A)
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Allocation Type | Single-year Grants |
Section | 一般 |
Research Field |
Condensed matter physics I
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Research Institution | Yokohama National University (2013, 2015) Tohoku University (2012, 2014) |
Principal Investigator |
Kosaka Hideo 横浜国立大学, 工学(系)研究科(研究院), 教授 (20361199)
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Project Period (FY) |
2012-04-01 – 2016-03-31
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Keywords | 量子エレクトロニクス / スピントロニクス / 光物性 / 量子井戸 / 量子ドット |
Outline of Final Research Achievements |
We succeeded experiments for quantum entanglement absorption to detect the entanglement between a ground state electron in an NV center and an incoming photon (published in Physical Review Letters), and quantum state transfer from a photon to a ground state electron based on the quantum teleportation scheme (published in Nature Photonics). Transfer fidelity of over 90% was achieved by purifying the transfer events based on post-selection. We also succeeded to prolong the quantum memory time (phase relaxation time) over 100 times by the developed geometric spin echo (published in Nature Communications). The phase relaxation time of world-longest 1.9 ms was achieved by repeating the echo.
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Free Research Field |
スピンエレクトロニクス
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