Protection of centre spin coherence by dynamic nuclear spin polarization in diamond

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	Protection of centre spin coherence by dynamic nuclear spin polarization in diamond
	Liu, GQ ; Jiang, QQ ; Chang, YC ; Liu, DQ ; Li, WX ; Gu, CZ ; Po, HC ; Zhang, WX ; Zhao, N ; Pan, XY
刊名	NANOSCALE
	2014
卷号	6 期号:17 页码:10134
ISSN号	2040-3364
通讯作者	Pan, XY (reprint author), Chinese Acad Sci, Inst Phys, Beijing Natl Lab Condensed Matter Phys, Beijing 100190, Peoples R China.
中文摘要	We experimentally investigate the protection of electron spin coherence of a nitrogen-vacancy (NV) centre in diamond by dynamic nuclear spin polarization (DNP). The electron spin decoherence of an NV centre is caused by the magnetic field fluctuation of the C-13 nuclear spin bath, which contributes large thermal fluctuation to the centre electron spin when it is in an equilibrium state at room temperature. To address this issue, we continuously transfer the angular momentum from electron spin to nuclear spins, and pump the nuclear spin bath to a polarized state under the Hartmann-Hahn condition. The bath polarization effect is verified by the observation of prolongation of the electron spin coherence time (T-2*). Optimal conditions for the DNP process, including the pumping pulse duration and repeat numbers, are proposed by numerical simulation and confirmed by experiment. We also studied the depolarization effect of laser pulses. Our results provide a new route for quantum information processing and quantum simulation using the polarized nuclear spin bath.
资助信息	National Basic Research Program of China (973 Program) [2014CB921402, 2009CB930502]; Strategic Priority Research Program of the Chinese Academy of Sciences [XDB07010300]; National Natural Science Foundation of China [10974251, 91123004, 11104334, 51272278, 11275139]; NKBRP (973 Program) [2014CB848700]
语种	英语
公开日期	2015-04-14
内容类型	期刊论文
源URL	[http://ir.iphy.ac.cn/handle/311004/59355]
专题	物理研究所_物理所公开发表论文_物理所公开发表论文_期刊论文
推荐引用方式 GB/T 7714	Liu, GQ,Jiang, QQ,Chang, YC,et al. Protection of centre spin coherence by dynamic nuclear spin polarization in diamond[J]. NANOSCALE,2014,6(17):10134.
APA	Liu, GQ.,Jiang, QQ.,Chang, YC.,Liu, DQ.,Li, WX.,...&Pan, XY.(2014).Protection of centre spin coherence by dynamic nuclear spin polarization in diamond.NANOSCALE,6(17),10134.
MLA	Liu, GQ,et al."Protection of centre spin coherence by dynamic nuclear spin polarization in diamond".NANOSCALE 6.17(2014):10134.