Reducing decoherence of the confined exciton state in a quantum dot by pulse-sequence control

被引：50

作者：

Axt, VM ^{[1
]}

Machnikowski, P

Kuhn, T

机构：

[1] Univ Munster, Inst Festkorpertheorie, D-48149 Munster, Germany

[2] Wroclaw Univ Technol, Inst Phys, PL-50370 Wroclaw, Poland

来源：

PHYSICAL REVIEW B | 2005年 / 71卷 / 15期

关键词：

D O I：

10.1103/PhysRevB.71.155305

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We study the phonon-induced dephasing of the exciton state in a quantum dot excited by a sequence of ultrashort pulses. We show that the multiple-pulse control leads to a considerable improvement of the coherence of the optically excited state. For a fixed control time window, the optimized pulsed control often leads to a higher degree of coherence than the control by a smooth, single Gaussian pulse. The reduction of dephasing is considerable already for 2-3 pulses.

引用

页数：9

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