Theory of fast optical spin rotation in a quantum dot based on geometric phases and trapped states

被引：88

作者：

Economou, Sophia E. ^{[1
]}

Reinecke, T. L. ^{[1
]}

机构：

[1] USN, Res Lab, Washington, DC 20375 USA

来源：

PHYSICAL REVIEW LETTERS | 2007年 / 99卷 / 21期

关键词：

Dissipative dynamics - Hyperbolic secant pulses - Optical spin rotation;

D O I：

10.1103/PhysRevLett.99.217401

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

A method is proposed for the optical rotation of the spin of an electron in a quantum dot using excited trion states to implement operations significantly faster than those of most existing proposals. Key ingredients are the geometric phase induced by 2 pi hyperbolic secant pulses, use of coherently trapped states and use of naturally dark states. Our proposal covers a variety of quantum dots by addressing different parameter regimes. Numerical simulations with typical parameters for InAs self-assembled quantum dots, including their dissipative dynamics, give fidelities of the operations in excess of 99%.

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页数：4

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