Coherent dynamics of a single spin interacting with an adjustable spin bath

被引：372

作者：

Hanson, R. ^{[1
]}

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

Feiguin, A. E. ^{[1
]}

Gywat, O. ^{[1
]}

Awschalom, D. D. ^{[1
]}

机构：

[1] Univ Calif Santa Barbara, Calif Nanosyst Inst, Santa Barbara, CA 93106 USA

[2] Ames Lab, Ames, IA 50011 USA

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

来源：

SCIENCE | 2008年 / 320卷 / 5874期

关键词：

D O I：

10.1126/science.1155400

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：

Phase coherence is a fundamental concept in quantum mechanics. Understanding the loss of coherence is paramount for future quantum information processing. We studied the coherent dynamics of a single central spin ( a nitrogen- vacancy center) coupled to a bath of spins ( nitrogen impurities) in diamond. Our experiments show that both the internal interactions of the bath and the coupling between the central spin and the bath can be tuned in situ, allowing access to regimes with surprisingly different behavior. The observed dynamics are well explained by analytics and numerical simulations, leading to valuable insight into the loss of coherence in spin systems. These measurements demonstrate that spins in diamond provide an excellent test bed for models and protocols in quantum information.

引用

页码：352 / 355

页数：4

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