Ultrafast optical manipulation of single electron spins in quantum dots

被引：4
|
作者：
Mikkelsen, M. H. [1 ]
Berezovsky, J. [1 ]
Awschalom, D. D. [1 ]
机构：
[1] Univ Calif Santa Barbara, Ctr Spintron & Quantum Computat, Santa Barbara, CA 93106 USA
来源：
SOLID STATE COMMUNICATIONS | 2009年 / 149卷 / 35-36期
关键词：
Quantum dots; Semiconductors; Nanostructures; Spin dynamics; SPECTRA; RESONANCE; SHIFT;
D O I：
10.1016/j.ssc.2009.04.038
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
Most schemes for quantum information processing require fast single qubit operations as well as initialization and read-out steps. Here we describe recent experimental realizations of schemes for time-resolved initialization, coherent control, and read-out of a single electron spin state in an individual quantum dot using all-optical techniques. The spin state is manipulated via the optical Stark effect using off-resonant, picosecond-scale optical pulses. The coherent rotation of a single electron spin state through arbitrary angles up to pi radians is demonstrated, constituting a single qubit gate. This spin manipulation is directly monitored using time-resolved Kerr rotation spectroscopy allowing for the observation of the coherent evolution of a single electron spin state in time as well as revealing the spin lifetime and g-factor. (C) 2009 Elsevier Ltd. All rights reserved.
引用
收藏
页码：1451 / 1457
页数：7
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