Universal Dynamical Decoupling of a Single Solid-State Spin from a Spin Bath

被引：637

作者：

de Lange, G. ^{[1
]}

Wang, Z. H. ^{[2
,3
]}

Riste, D. ^{[1
]}

Dobrovitski, V. V. ^{[2
,3
]}

Hanson, R. ^{[1
]}

机构：

[1] Delft Univ Technol, Kavli Inst Nanosci Delft, NL-2600 GA Delft, Netherlands

[2] Ames Lab, Ames, IA 50011 USA

[3] Iowa State Univ, Ames, IA 50011 USA

来源：

SCIENCE | 2010年 / 330卷 / 6000期

关键词：

NUCLEAR-SPIN; COHERENT DYNAMICS; COUPLED ELECTRON; QUANTUM MEMORY; DIAMOND; DOTS;

D O I：

10.1126/science.1192739

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Controlling the interaction of a single quantum system with its environment is a fundamental challenge in quantum science and technology. We strongly suppressed the coupling of a single spin in diamond with the surrounding spin bath by using double-axis dynamical decoupling. The coherence was preserved for arbitrary quantum states, as verified by quantum process tomography. The resulting coherence time enhancement followed a general scaling with the number of decoupling pulses. No limit was observed for the decoupling action up to 136 pulses, for which the coherence time was enhanced more than 25 times compared to that obtained with spin echo. These results uncover a new regime for experimental quantum science and allow us to overcome a major hurdle for implementing quantum information protocols.

引用

页码：60 / 63

页数：4

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