Implementation of Highfield W-Band Quantum-Phase Controlled FT Pulsed Electron Magnetic Resonance for Molecular Spinics

高场 W 波段量子相控 FT 脉冲电子磁共振在分子自旋学中的实现

• 批准号: 10304049
• 负责人: TAKUII Takeji
• 金额: $ 22.47万
• 依托单位: Osaka City University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (A)
• 财政年份: 1998
• 资助国家: 日本
• 起止时间: 1998 至 2001
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-10304049/
• 关键词: Pulse-based electron magnetic resonaznce; Magnetic dipolar spinwave; Quantum phase control; Molecular spinics; Molecular magnetism; Organic magnetism; Quantum information processing; Quantum computer; 分子スピークス; 高磁場ESR; パルスESR; 量子位相; Wバンド電子磁気共鳴

During the research period, the implementation of highfield W-band quantum-phase controlled FT pulsed electron magnetic resonance for molecular spinics was carried out from both theoretical and experimental sides. The main purpose of the research project was to establish the methodology in terms of electron magnetic resonance for controlling quantum phases of both electron spins and nuclear spins in molecular frames such as organic open-shell systems. The quantum phase control is essential to build up any quantum computers or quantum information processing systems based on spin qubits. Particularly, the manipulation of electron phases has been intractable in terms of magnetic resonance spectroscopy. In this project, the phases between two addressable electron spins in organic high spins have been controlled for the first time. The corresponding experimental setup has been based on pulsed electron-electron double resonance technology operating at Q-band, attempting to up-convert the microwave frequency to W-band. Several important experiments for quantum computing and quantum information processing such as super-dense coding or inter-conversion between Bell states composed of electron/nuclear qubits as synthetic qubits in molecular frames have been for the first time achieved at low temperature. The approach established in the project is applicable to the extension to multiple-frequency versions, but it costs enormously. The technical innovation was attempted by using arbitrary wave generation based on high-frequency digital technology operating at low microwave frequency regions. In the alternative approach, the number of microwave frequencies, their relative phase and amplitudes are able to controlled. Also, during the research project, molecular design for scalable electron/nuclear spin qubits and their synthetic attempt have been carried out, aiming at building up "practical" quantum computers and quantum information processing systems.

在研究期间，从理论和实验方面都进行了高场W波段量子量相控制的FT脉冲电子磁共振，用于分子旋转。研究项目的主要目的是建立通过电子磁共振来建立方法，用于控制分子帧（例如有机开放式壳系统）中电子旋转和核自旋的量子相。量子相控制对于建立基于旋转量子的任何量子计算机或量子信息处理系统至关重要。特别是，在磁共振光谱方面，对电子相的操纵非常棘手。在这个项目中，首次控制了有机高旋转中两个可寻址电子旋转之间的阶段。相应的实验设置基于在Q波段运行的脉冲电子双共振技术，试图将微波频率转换为W波段。量子计算和量子信息处理的几个重要实验，例如由电子/核Qubits组成的钟状状态之间的超密集编码或转换，作为分子框架中的合成粒子，在低温下首次实现。项目中建立的方法适用于扩展到多频版本的扩展，但价格却高。通过基于在低微波频率区域运行的高频数字技术使用任意波的产生，尝试了技术创新。在替代方法中，微波频率的数量，它们的相对相和幅度能够控制。同样，在研究项目期间，已经进行了可扩展电子/核自旋量子的分子设计及其合成尝试，旨在构建“实用”量子计算机和量子信息处理系统。

项目成果

Takayasu Kanaya et al.: "Single-Component Ferrimagnetics : Triplet-Doublet Composite Molecules as Constituents of Purely Organic Molecule-Based Ferrimagnets"Polyhedron. (印刷中). (2001)

Takayasu Kanaya 等人：“单组分亚铁磁性：三重态-双态复合分子作为纯有机分子亚铁磁体的组成部分”（出版中）。

Spin alignment in high-spin carbenes of heteroatomic pi-conjugation ; Invalidity of simple extension of "pi-topology rule" for homoatomic systems

杂原子π共轭的高自旋卡宾的自旋排列；

• 发表时间: 1999
• 期刊: Mol.Cryst.Lig.Cryst.Sci. & Technology 334
• 作者: J.Y.Bae;M.Yano;K.Sato;D.Shiomi;T.Takui;M.Kinoshita;T.Abe;K.Itoh;D.I.Hong
• 通讯作者: D.I.Hong

Electronic states and spin characterization of polyanionic high-spin molecules and clusters derived from 1,3-dibenzoylbenzene derivatives as studied by ESR/electron spin transient nutation spectroscopy

通过 ESR/电子自旋瞬态章动光谱研究源自 1,3-二苯甲酰苯衍生物的聚阴离子高自旋分子和簇的电子态和自旋表征

• 发表时间: 1999
• 期刊: Mol.Cryst.Lig.Cryst.Sci. & Technology 334
• 作者: S.Nakazawa;K.Sato;D.Shiomi;M.Yano;T.Kinoshita;K.Abe;T.Takui;K.Itoh
• 通讯作者: K.Itoh

S.Nakazawa et al.: "Electronic states of polyanionic high-spin C-60 fullerene and their clusters : anomalous spin relaxation and Jahn-Teller effects"Synth. Met.. 121. 1169-1170 (2001)

S.Nakazawa 等人：“聚阴离子高自旋 C-60 富勒烯及其簇的电子态：反常自旋弛豫和 Jahn-Teller 效应”Synth。

T.Kanaya et al.: "Single-component ferrimagnetics : triplet-doublet composite molecules as constituents of purely organic molecule-based ferrimagnets"Polyhedron. 20. 1397-1402 (2001)

T.Kanaya 等人：“单组分亚铁磁体：三线态-双线态复合分子作为纯有机分子基亚铁磁体的组成部分”多面体。