Fast Electrical Control of Single Electron Spins in Quantum Dots with Vanishing Influence from Nuclear Spins

被引：73

作者：

Yoneda, J. ^{[1
,2
]}

Otsuka, T. ^{[1
,2
]}

Nakajima, T. ^{[1
,2
]}

Takakura, T. ^{[1
]}

Obata, T. ^{[1
]}

Pioro-Ladriere, M. ^{[3
,4
]}

Lu, H. ^{[5
]}

Palmstrom, C. J. ^{[5
,6
]}

Gossard, A. C. ^{[5
]}

Tarucha, S. ^{[1
,2
]}

机构：

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

[2] RIKEN, Ctr Emergent Matter Sci, Wako, Saitama 3510198, Japan

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

[4] Canadian Inst Adv Res CIFAR, CIFAR Program Quantum Informat Sci, Toronto, ON M5G 1Z8, Canada

[5] Univ Calif Santa Barbara, Dept Mat, Santa Barbara, CA 93106 USA

[6] Univ Calif Santa Barbara, Santa Barbara, CA 93106 USA

来源：

PHYSICAL REVIEW LETTERS | 2014年 / 113卷 / 26期

基金：

日本学术振兴会; 加拿大自然科学与工程研究理事会;

关键词：

COHERENT MANIPULATION; SPINTRONICS; QUBIT; SEMICONDUCTORS; OSCILLATIONS; COMPUTATION; RESONANCE;

D O I：

10.1103/PhysRevLett.113.267601

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We demonstrate fast universal electrical spin manipulation with inhomogeneous magnetic fields. With fast Rabi frequency up to 127 MHz, we leave the conventional regime of strong nuclear-spin influence and observe a spin-flip fidelity > 96%, a distinct chevron Rabi pattern in the spectral-time domain, and a spin resonance linewidth limited by the Rabi frequency, not by the dephasing rate. In addition, we establish fast z rotations up to 54 MHz by directly controlling the spin phase. Our findings will significantly facilitate tomography and error correction with electron spins in quantum dots.

引用

页数：5

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