Improving the lifetime of the nitrogen-vacancy-center ensemble coupled with a superconducting flux qubit by applying magnetic fields

被引：22

作者：

Matsuzaki, Yuichiro ^{[1
]}

Zhu, Xiaobo ^{[2
]}

Kakuyanagi, Kosuke ^{[1
]}

Toida, Hiraku ^{[1
]}

Shimooka, Takaaki ^{[3
]}

Mizuochi, Norikazu ^{[3
]}

Nemoto, Kae ^{[4
]}

Semba, Kouichi ^{[5
]}

Munro, W. J. ^{[1
]}

Yamaguchi, Hiroshi ^{[1
]}

Saito, Shiro ^{[1
]}

机构：

[1] NTT Corp, NTT Basic Res Labs, 3-1 Morinosato Wakamiya, Atsugi, Kanagawa 2430198, Japan

[2] Chinese Acad Sci, Inst Phys, Beijing 100190, Peoples R China

[3] Osaka Univ, Grad Sch Engn Sci, Toyonaka, Osaka 5608531, Japan

[4] Natl Inst Informat, Chiyoda Ku, Tokyo 1018430, Japan

[5] Natl Inst Informat & Commun Technol, Koganei, Tokyo 1848795, Japan

来源：

PHYSICAL REVIEW A | 2015年 / 91卷 / 04期

关键词：

SPIN COHERENCE TIME;

D O I：

10.1103/PhysRevA.91.042329

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

One of the promising systems to realize quantum computation is a hybrid system where a superconducting flux qubit plays the role of a quantum processor and the nitrogen-vacancy-(NV-) center ensemble is used as a quantum memory. We have theoretically and experimentally studied the effect of magnetic fields on this hybrid system, and found that the lifetime of the vacuum Rabi oscillation is improved by applying a few mT magnetic field to the NV- center ensemble. Here, we construct a theoretical model to reproduce the vacuum Rabi oscillations with and without magnetic fields applied to the NV- centers, and we determine the reason why magnetic fields can affect the coherent properties of the NV- center ensemble. From our theoretical analysis, we quantitatively show that the magnetic fields actually suppress the inhomogeneous broadening from the strain in the NV- centers.

引用

页数：5

共 35 条

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[30] Implementation of a nonlocal N-qubit conditional phase gate using the nitrogen-vacancy center and microtoroidal resonator coupled systems
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