Dynamical decoupling of a single-electron spin at room temperature

被引：217

作者：

Naydenov, Boris ^{[1
,2
]}

Dolde, Florian ^{[1
,2
]}

Hall, Liam T. ^{[3
]}

Shin, Chang ^{[4
]}

Fedder, Helmut ^{[1
,2
]}

Hollenberg, Lloyd C. L. ^{[3
]}

Jelezko, Fedor ^{[1
,2
]}

Wrachtrup, Joerg ^{[1
,2
]}

机构：

[1] Univ Stuttgart, Inst Phys 3, D-70659 Stuttgart, Germany

[2] Univ Stuttgart, Res Ctr SCOPE, D-70659 Stuttgart, Germany

[3] Univ Melbourne, Sch Phys, Ctr Quantum Comp Technol, Melbourne, Vic 3010, Australia

[4] Cornell Univ, Dept Chem & Chem Biol, Natl Biomed Ctr Adv ESR Technol, Ithaca, NY 14853 USA

来源：

PHYSICAL REVIEW B | 2011年 / 83卷 / 08期

基金：

澳大利亚研究理事会;

关键词：

RELAXATION-TIMES; DIAMOND; COHERENCE; STATE;

D O I：

10.1103/PhysRevB.83.081201

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Here we report the increase of the coherence time T(2) of a single-electron spin at room temperature by using dynamical decoupling. We show that the Carr-Purcell-Meiboom-Gill (CPMG) pulse sequence can prolong the T(2) of a single nitrogen-vacancy center in diamond up to 2.44 ms compared to the Hahn echo measurement where T(2) = 400 mu s. Moreover, by performing spin-locking experiments we demonstrate that with CPMG the maximum possible T(2) is reached. On the other hand, we do not observe a strong increase of the coherence time in nanodiamonds, possibly due to the short spin-lattice relaxation time T(1) = 100 mu s (compared to T(1) = 5.93 ms in bulk). An application for detecting low magnetic fields is demonstrated, where we show that the sensitivity using the CPMG method is improved by about a factor of 2 compared to the Hahn echo method.

引用

页数：4

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