论文标题
磁场诱导的混合电子核自旋合奏中的离域化
Magnetic-field-induced delocalization in hybrid electron-nuclear spin ensembles
论文作者
论文摘要
我们使用场循环辅助的动态核极化和连续射频（RF）在广泛的光谱范围内驱动，以证明来自钻石中强的杂红耦合13C位点的核自旋转运的磁场依赖性激活。我们借助电子旋转介导核自旋相互作用的理论框架来解释我们的观察结果。特别是，我们建立在4旋旋玩具模型的结果基础上，以表明在与较大的Ancilla旋转网络接触时，其他局部核自旋必须如何热化。此外，通过探测系统对可变驱动场振幅的响应，我们目睹了RF吸附光谱的鲜明变化，我们将其解释为部分原因是由于异质多型旋转集的贡献，其“零量化量子”的过渡成为RF的主动，这要归功于系统的混合电子 - 系统的系统。这些发现可能与动态核极化，基于自旋的量子信息处理和纳米级传感有关。
We use field-cycling-assisted dynamic nuclear polarization and continuous radio-frequency (RF) driving over a broad spectral range to demonstrate magnetic-field-dependent activation of nuclear spin transport from strongly-hyperfine-coupled 13C sites in diamond. We interpret our observations with the help of a theoretical framework where nuclear spin interactions are mediated by electron spins. In particular, we build on the results from a 4-spin toy model to show how otherwise localized nuclear spins must thermalize as they are brought in contact with a larger ancilla spin network. Further, by probing the system response to a variable driving field amplitude, we witness stark changes in the RF-absorption spectrum, which we interpret as partly due to contributions from heterogeneous multi-spin sets, whose 'zero-quantum' transitions become RF active thanks to the hybrid electron-nuclear nature of the system. These findings could prove relevant in applications to dynamic nuclear polarization, spin-based quantum information processing, and nanoscale sensing.
