All-electrical coherent control of the exciton states in a single quantum dot

被引：22

作者：

de la Giroday, A. Boyer ^{[1
,2
]}

Bennett, A. J. ^{[1
]}

Pooley, M. A. ^{[1
,2
]}

Stevenson, R. M. ^{[1
]}

Skoeld, N. ^{[1
]}

Patel, R. B. ^{[1
,2
]}

Farrer, I. ^{[2
]}

Ritchie, D. A. ^{[2
]}

Shields, A. J. ^{[1
]}

机构：

[1] Toshiba Res Europe Ltd, Cambridge Res Lab, Cambridge CB4 0GZ, England

[2] Univ Cambridge, Cavendish Lab, Cambridge CB3 0HE, England

来源：

PHYSICAL REVIEW B | 2010年 / 82卷 / 24期

基金：

英国工程与自然科学研究理事会;

关键词：

SPINS;

D O I：

10.1103/PhysRevB.82.241301

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We demonstrate high-fidelity reversible transfer of quantum information from the polarization of photons into the spin state of an electron-hole pair in a semiconductor quantum dot. Moreover, spins are electrically manipulated on a subnanosecond time scale, allowing us to coherently control their evolution. By varying the area of the electrical pulse, we demonstrate phase-shift and spin-flip gate operations with near-unity fidelities. Our system constitutes a controllable quantum interface between flying and stationary qubits, an enabling technology for quantum logic in the solid state.

引用

页数：4

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