Coherence of nitrogen-vacancy electronic spin ensembles in diamond

被引：257

作者：

Stanwix, P. L. ^{[1
,2
]}

Pham, L. M. ^{[3
]}

Maze, J. R. ^{[4
,5
]}

Le Sage, D. ^{[1
]}

Yeung, T. K. ^{[3
]}

Cappellaro, P. ^{[6
]}

Hemmer, P. R. ^{[7
]}

Yacoby, A. ^{[4
]}

Lukin, M. D. ^{[4
]}

Walsworth, R. L. ^{[1
,4
]}

机构：

[1] Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA

[2] Univ Western Australia, Sch Phys, Crawley, WA 6009, Australia

[3] Harvard Univ, Sch Engn & Appl Sci, Cambridge, MA 02138 USA

[4] Harvard Univ, Dept Phys, Cambridge, MA 02138 USA

[5] Pontificia Univ Catolica Chile, Fac Fis, Santiago 22, Chile

[6] MIT, Dept Nucl Sci & Engn, Cambridge, MA 02139 USA

[7] Texas A&M Univ, Dept Elect & Comp Engn, College Stn, TX 77843 USA

来源：

PHYSICAL REVIEW B | 2010年 / 82卷 / 20期

基金：

美国国家科学基金会;

关键词：

SINGLE SPINS; DYNAMICS; QUBITS; STATE;

D O I：

10.1103/PhysRevB.82.201201

中图分类号：

T [工业技术];

学科分类号：

08 ;

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 (T(2)) comparable to that of single NV with T(2) > 600 mu s for a sample with natural abundance of (13)C and paramagnetic impurity density similar to 10(15) 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 (13)C 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.

引用

页数：4

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