An on-demand coherent single-electron source

被引：462

作者：

Feve, G.

Mahe, A.

Berroir, J. M.

Kontos, T.

Placais, B.

Glattli, D. C.

Cavanna, A.

Etienne, B.

Jin, Y.

机构：

[1] Ecole Normale Super, Dept Phys, Lab Pierre Aigrain, F-75231 Paris 05, France

[2] CEA Saclay, Serv Phys Etat Condense, F-91191 Gif Sur Yvette, France

[3] CNRS, UPR 20, Lab Photon & Nanostruct, F-91460 Marcoussis, France

来源：

SCIENCE | 2007年 / 316卷 / 5828期

关键词：

D O I：

10.1126/science.1141243

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

We report on the electron analog of the single-photon gun. On-demand single-electron injection in a quantum conductor was obtained using a quantum dot connected to the conductor via a tunnel barrier. Electron emission was triggered by the application of a potential step that compensated for the dot-charging energy. Depending on the barrier transparency, the quantum emission time ranged from 0.1 to 10 nanoseconds. The single-electron source should prove useful for the use of quantum bits in ballistic conductors. Additionally, periodic sequences of single-electron emission and absorption generate a quantized alternating current.

引用

收藏

页码：1169 / 1172

页数：4

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