Two-Qubit Gate of Combined Single-Spin Rotation and Interdot Spin Exchange in a Double Quantum Dot

被引：189

作者：

Brunner, R. ^{[1
,2
]}

Shin, Y. -S. ^{[1
]}

Obata, T. ^{[1
,3
]}

Pioro-Ladriere, M. ^{[4
]}

Kubo, T. ^{[5
]}

Yoshida, K. ^{[1
]}

Taniyama, T. ^{[6
,7
]}

Tokura, Y. ^{[1
,5
]}

Tarucha, S. ^{[1
,3
]}

机构：

[1] Japan Sci & Technol Agcy, ICORP, Quantum Spin Informat Project, Atsugi, Kanagawa 2430198, Japan

[2] Univ Leoben, Inst Phys, A-8700 Leoben, Austria

[3] Univ Tokyo, Dept Appl Phys, Bunkyo Ku, Tokyo 1138656, Japan

[4] Univ Sherbrooke, Dept Phys, Sherbrooke, PQ J1K 2R1, Canada

[5] NTT Corp, NTT Basic Res Labs, Atsugi, Kanagawa 2430198, Japan

[6] Tokyo Inst Technol, Mat & Struct Lab, Yokohama, Kanagawa 2268503, Japan

[7] Japan Sci & Technol Agcy, PRESTO, Kawaguchi, Saitama 3320012, Japan

来源：

PHYSICAL REVIEW LETTERS | 2011年 / 107卷 / 14期

关键词：

SLANTING ZEEMAN FIELD; ELECTRON SPIN;

D O I：

10.1103/PhysRevLett.107.146801

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

A crucial requirement for quantum-information processing is the realization of multiple-qubit quantum gates. Here, we demonstrate an electron spin-based all-electrical two-qubit gate consisting of single-spin rotations and interdot spin exchange in a double quantum dot. A partially entangled output state is obtained by the application of the two-qubit gate to an initial, uncorrelated state. We find that the degree of entanglement is controllable by the exchange operation time. The approach represents a key step towards the realization of universal multiple-qubit gates.

引用

页数：4

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