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有读书笔记Quantum control of proximal spins using nanoscale magnetic resonance imaging

唐唐 添加于 2011-5-20 03:57 | 1629 次阅读 | 0 个评论
  •  作 者

    Grinolds MS, Maletinsky P, Hong S, Lukin MD, Walsworth RL, Yacoby A
  •  摘 要

    Quantum control of individual spins in condensed-matter systems is an emerging field with wide-ranging applications in spintronics1, quantum computation2 and sensitive magnetometry3. Recent experiments have demonstrated the ability to address and manipulate single electron spins through either optical4, 5 or electrical techniques6, 7, 8. However, it is a challenge to extend individual-spin control to nanometre-scale multi-electron systems, as individual spins are often irresolvable with existing methods. Here we demonstrate that coherent individual-spin control can be achieved with few- nanometre resolution for proximal electron spins by carrying out single-spin magnetic resonance imaging (MRI), which is realized using a scanning-magnetic-field gradient that is both strong enough to achieve nanometre spatial resolution and sufficiently stable for coherent spin manipulations. We apply this scanning-field-gradient MRI technique to electronic spins in nitrogen–vacancy (NV) centres in diamond and achieve nanometre resolution in imaging, characterization and manipulation of individual spins. For NV centres, our results in individual-spin control demonstrate an improvement of nearly two orders of magnitude in spatial resolution when compared with conventional optical diffraction-limited techniques. This scanning-field-gradient microscope enables a wide range of applications including materials characterization, spin entanglement and nanoscale magnetometry.
  •  详细资料

    • 文献种类:期刊
    • 期刊名称: Nature Physics
    • 期刊缩写: Nat Phys
    • 期卷页: 2011
    • ISBN: 1745-2473
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  •  唐唐 的文献笔记  订阅

    磁共振成像可解析固体材料单个原子
    研究人员发现,磁共振成像技术可以定位和解析嵌入在固体材料中的单个原子,新成果发表在5月在线出版的《自然—物理学》期刊上。新方法可实施彼此独立的受控单电子旋转,受控单电子旋转在技术上有重要的应用。
     
    以前,科学家们已经探测到单电子旋转,但所用的方法很难拓展到多电子旋转系统。Michael Grinolds和同事合作,显示磁振成像技术能在纳米尺度的分辨率内解析出三维空间中的单电子自旋。(来源:科学时报 王丹红/编译)
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