Hyperpolarized relaxometry based nuclear T 1 noise spectroscopy in hybrid diamond quantum registers
Hyperpolarized relaxometry based nuclear T 1 noise spectroscopy in hybrid diamond quantum registers
复制标题
混合金刚石量子寄存器中基于超极化弛豫测量的核 T 1 噪声光谱
DOI：
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发表时间：
2019
期刊：
影响因子：
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通讯作者：
A. Pines
中科院分区：
文献类型：
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作者：
A. Ajoy;B. Safvati;R. Nazaryan;J. Oon;B. Han;P. Raghavan;R. Nirodi;A. Aguilar;K. Liu;X. Cai;X. Lv;E. Druga;C. Ramanathan;J. Reimer;C. Meriles;D. Suter;A. Pines
理解量子系统中自旋寿命的起源在量子信息和传感的几个领域中是当前重要的问题。光谱映射自旋弛豫过程的方法提供了对其起源的深入了解，并可以激励减轻它们的方法。在本文中，使用超极化和精密场循环在很宽的范围内（1 mT - 7 T）的组合，我们映射的频率依赖的弛豫在一个典型的系统的13 C核自旋在金刚石耦合到氮空位电子中心。通过光学泵浦NV电子的核超极化允许测量的信号时间节省超过常规方法的百万倍。我们观察到，13 C寿命表现出戏剧性的场依赖性，随着场的快速增长，达到100 mT，然后饱和。通过系统的研究，随着替代电子（P1中心）浓度以及13 C富集水平的增加，我们确定了在不同的领域制度的核的操作弛豫通道。特别是，我们证明了13 C核耦合到相互作用的P1电子自旋浴所发挥的主导作用。这些结果为耗散工程的量子控制技术铺平了道路，以提高金刚石的自旋寿命，应用范围从工程量子存储器到超极化13 C成像，以及更广泛的混合量子系统的弛豫研究。
Understanding the origins of spin lifetimes in quantum systems is a matter of current importance in several areas of quantum information and sensing. Methods that spectrally map spin relaxation processes provide insight into their origin and can motivate methods to mitigate them. In this paper, using a combination of hyperpolarization and precision field cycling over a wide range (1 mT - 7 T), we map frequency dependent relaxation in a prototypical system of 13 C nuclear spins in diamond coupled to Nitrogen Vacancy electronic centers. Nuclear hyperpolarization through the optically pumped NV electrons allows signal time savings for the measurements exceeding million-fold over conventional methods. We observe that 13 C lifetimes show a dramatic field dependence, growing rapidly with field up to ∼ 100 mT and saturating thereafter. Through a systematic study with increasing substitutional electron (P1 center) concentration as well as 13 C enrichment levels, we identify the operational relaxation channels for the nuclei in different field regimes. In particular, we demonstrate the dominant role played by the 13 C nuclei coupling to the interacting P1 electronic spin bath. These results pave the way for quantum control techniques for dissipation engineering to boost spin lifetimes in diamond, with applications ranging from engineered quantum memories to hyperpolarized 13 C imaging, and more broadly to relaxation studies in hybrid quantum systems.