Quantum Control of a Trapped Electron Spin in a Quantum Dot Using Photon Polarization

被引：14

作者：

Dubin, Francois ^{[1
,2
]}

Combescot, Monique ^{[3
]}

Brennen, Gavin K. ^{[4
,5
]}

Melet, Romain ^{[3
]}

机构：

[1] ICFO Inst Ciencies Foton, E-08860 Castelldefels, Spain

[2] Univ Innsbruck, Inst Expt Phys, A-6020 Innsbruck, Austria

[3] Univ Paris 06, CNRS, Inst Nanosci Paris, F-75015 Paris, France

[4] Austrian Acad Sci, Inst Quantum Opt & Quantum Informat, A-6020 Innsbruck, Austria

[5] Macquarie Univ, Ctr Quantum Informat Sci & Secur, N Ryde, NSW 2109, Australia

来源：

PHYSICAL REVIEW LETTERS | 2008年 / 101卷 / 21期

关键词：

D O I：

10.1103/PhysRevLett.101.217403

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We present an original scheme to rotate at will one electron spin trapped in a quantum dot by just acting on pump-laser polarization: The quantum control is based on the virtual excitation of electron light-hole pairs with pi symmetry, as possibly done by using a single laser beam with a propagation axis slightly tilted with respect to a weak magnetic field. This allows us to fully control the effective axis of the electron spin rotation through the pump polarization. Our analysis shows that quantum dots with inverted valence states are ideal candidates for ultrafast, high-fidelity, all optical control.

引用

页数：4

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