A study of molecular electron spin ensemble systems suitable for quantum spin memories coupled with superconducting flux qubit circuits
| Project/Area Number |
25410098
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Functional solid state chemistry
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| Research Institution | Osaka City University |
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Principal Investigator |
NAKAZAWA SHIGEAKI 大阪市立大学, 大学院理学研究科, 特任准教授 (70342821)
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| Co-Investigator(Kenkyū-buntansha) |
TAKUI Takeji 大阪市立大学, 大学院理学研究科, 特任教授 (10117955)
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| Project Period (FY) |
2013-04-01 – 2016-03-31
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| Project Status |
Completed (Fiscal Year 2015)
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| Budget Amount *help |
¥4,810,000 (Direct Cost: ¥3,700,000、Indirect Cost: ¥1,110,000)
Fiscal Year 2015: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2014: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2013: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
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| Keywords | 量子情報処理 / 量子メモリー / 電子スピン共鳴 / 三重項ジラジカル / 希釈単結晶 / 超伝導磁束量子ビット / 量子メモリ / 分子スピン / ESR / GRAPEパルス / Qubit / ニトロニルニトロキシドラジカル / 量子コンピュータ / 基底三重項状態 / ＥＳＲ / ニトロニルニトロキシド / 基底三重項 |
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| Outline of Final Research Achievements |
Hybridization between molecular spin ensemble qubits and superconducting flux qubit circuits has been targeted by using ground-state triplet organic molecules with large fine-structure constants. We have found that one of the stable triplet diradicals in the ground state has a large D value (-0.0655 cm-1), the largest among the ground-state triplet (S = 1) nitroxide-based diradicals documented so far.
The magnetically diluted single crystals were obtained by cocrystallization of a mixture of the diradical and diamagnetic host molecule which molecular structure corresponds to that of the diradical with replacement of NO groups by CO groups. The fine-structure (D) tensors of the diradical and its analog in the single crystals were determined by single-crystal ESR spectrosopy. We have solved a technical issue on flattening the surface of the small single crystals, which ensures good physical contact between the spin crystal and the circuit.
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Report
(4 results)
Research Products
(25 results)
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[Journal Article] Hyperfine spin qubits in irradiated malonic acid: heat-bath algorithmic cooling2015
Author(s)
Park, D.K.; Feng, G.; Rahimi, R.; Labruyere, S.; Shibata, T.; Nakazawa, S.; Sato, K.; Takui, T.; Laflamme, R.; Baugh, J.
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Journal Title
Quantum Inf. Processing
Volume: 14
Issue: 7
Pages: 2435-2461
DOI
Related Report
Peer Reviewed / Int'l Joint Research
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[Journal Article] Pulsed electron spin nutation spectroscopy for weakly exchange-coupled multi-spin molecular systems with nuclear hyperfine couplings: a general approach to bi- and triradicals and determination of their spin dipolar and exchange interactions2013
Author(s)
K. Ayabe, K. Sato, S. Nakazawa, S. Nishida, K. Sugisaki, T. Ise, Y. Morita, K. Toyota, D. Shiomi, M. Kitagawa, S. Suzuki, K. Okada, T. Takui
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Journal Title
Mol. Phys
Volume: 111
Issue: 18-19
Pages: 2767-2787
DOI
Related Report
Peer Reviewed
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[Book] Molecular spin qubits: Molecular optimization of synthetic spin qubits, molecular spin AQC and ensemble spin manipulation technology in Quantum Computing, Quantum Communication and Quantum Metrology (Chapter X)2015
Author(s)
Shigeaki Nakazawa, Shinsuke Nishida, Kazunobu Sato, Kazuo Toyota, Daisuke Shiomi, Yasushi Morita, Kenji Sugisaki, Elham Hosseini, Koji Maruyama, Satoru Yamamoto, Masahiro Kitagawa and Takeji Takui
Total Pages
20
Publisher
Springer-Verlag
Related Report
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[Book] Quantum Computing, Quantum Communication and Quantum Metrology: Chapter X2015
Author(s)
Shigeaki Nakazawa, Shinsuke Nishida, Kazunobu Sato, Kazuo Toyota, Daisuke Shiomi, Yasushi Morita, Kenji Sugisaki, Elham Hosseini, Koji Maruyama, Satoru Yamamoto, Masahiro Kitagawa and Takeji Takui
Total Pages
22
Publisher
Springer-Verlag
Related Report
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