Tuning a Spin Bath through the Quantum-Classical Transition

被引：57

作者：

Reinhard, Friedemann ^{[1
,2
]}

Shi, Fazhan ^{[1
,2
,3
]}

Zhao, Nan ^{[1
,2
,4
,5
]}

Rempp, Florian ^{[1
,2
]}

Naydenov, Boris ^{[1
,2
,6
]}

Meijer, Jan ^{[7
]}

Hall, Liam T. ^{[8
]}

Hollenberg, Lloyd ^{[8
]}

Du, Jiangfeng ^{[3
]}

Liu, Ren-Bao ^{[4
,5
]}

Wrachtrup, Joerg ^{[1
,2
]}

机构：

[1] Univ Stuttgart, Inst Phys 3, D-70569 Stuttgart, Germany

[2] Univ Stuttgart, Res Ctr SCoPE, D-70569 Stuttgart, Germany

[3] Univ Sci & Technol China, Dept Modern Phys, Hefei 230026, Anhui, Peoples R China

[4] Chinese Univ Hong Kong, Dept Phys, Shatin, Hong Kong, Peoples R China

[5] Chinese Univ Hong Kong, Ctr Quantum Coherence, Shatin, Hong Kong, Peoples R China

[6] Univ Ulm, Inst Quantum Opt, D-89069 Ulm, Germany

[7] Ruhr Univ Bochum, RUBION, D-44801 Bochum, Germany

[8] Univ Melbourne, Ctr Quantum Computat & Commun Technol, Sch Phys, Melbourne, Vic 3010, Australia

来源：

PHYSICAL REVIEW LETTERS | 2012年 / 108卷 / 20期

基金：

澳大利亚研究理事会; 中国国家自然科学基金;

关键词：

DECOHERENCE; ELECTRON;

D O I：

10.1103/PhysRevLett.108.200402

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We study decoherence of a single nitrogen-vacancy (NV) center induced by the C-13 nuclear spin bath of diamond. By comparing Hahn-Echo experiments on single and double-quantum transitions of the NV triplet ground state we demonstrate that this bath can be tuned into two different regimes. At low magnetic fields, the nuclei behave as a quantum bath which causes decoherence by entangling with the NV central spin. At high magnetic fields, the bath behaves as a source of classical magnetic field noise, which creates decoherence by imprinting a random phase on the NV central spin.

引用

页数：5

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