Coherence of nitrogen-vacancy electronic spin ensembles in diamond

作     者：P. L. Stanwix L. M. Pham J. R. Maze D. Le Sage T. K. Yeung P. Cappellaro P. R. Hemmer A. Yacoby M. D. Lukin R. L. Walsworth 

作者机构：Harvard-Smithsonian Center for Astrophysics Cambridge Massachusetts 02138 USA School of Physics University of Western Australia Crawley Western Australia 6009 Australia School of Engineering and Applied Sciences Harvard University Cambridge Massachusetts 02138 USA Physics Department Harvard University Cambridge Massachusetts 02138 USA Facultad de Física Pontificia Universidad Católica de Chile Casilla 306 Santiago Chile Department of Nuclear Science and Engineering Massachusetts Institute of Technology Cambridge Massachusetts 02139 USA Department of Electrical and Computer Engineering Texas A&M University College Station Texas 77843 USA 

出 版 物：《Physical Review B》 (物理学评论B辑：凝聚态物质与材料物理学)

年 卷 期：2010年第82卷第20期

页      面：201201(R)-201201(R)页

核心收录：

学科分类：07[理学] 0702[理学-物理学] 

基　　金：NIST NSF DARPA Direct For Mathematical & Physical Scien Division Of Physics Funding Source: National Science Foundation 

摘      要：We present an experimental and theoretical study of electronic spin decoherence in ensembles of nitrogen-vacancy (NV) color centers in bulk high-purity diamond at room temperature. Under appropriate conditions, we find ensemble NV spin coherence times (T2) comparable to that of single NV with T2600 μs for a sample with natural abundance of C13 and paramagnetic impurity density ∼1015 cm−3. We also observe a sharp decrease in the coherence time with misalignment of the static magnetic field relative to the NV electronic spin axis, consistent with theoretical modeling of NV coupling to a C13 nuclear-spin bath. The long coherence times and increased signal-to-noise provided by room-temperature NV ensembles will aid many applications of NV centers in precision magnetometry and quantum information.