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Quantum control of proximal spins using nanoscale magnetic resonance imaging

唐唐添加于 2011-5-20 03:57 | 1630 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年
- ISBN: 1745-2473
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