Mode Locking of Electron Spin Coherences in Singly Charged Quantum Dots

The fast dephasing of electron spins in an ensemble of quantum dots is detrimental for applications in quantum information processing. We show here that dephasing can be overcome by using a periodic train of light pulses to synchronize the phases of the precessing spins, and we demonstrate this effe...

Full description

Saved in:
Bibliographic Details
Published inScience (American Association for the Advancement of Science) Vol. 313; no. 5785; pp. 341 - 345
Main Authors Greilich, A, Yakovlev, D.R, Shabaev, A, Efros, Al.L, Yugova, I.A, Oulton, R, Stavarache, V, Reuter, D, Wieck, A, Bayer, M
Format Journal Article
LanguageEnglish
Published United States American Association for the Advancement of Science 21.07.2006
The American Association for the Advancement of Science
Subjects
Density
Electrical phases
Electron spin
Electrons
Information processing
Lasers
light
Magnetic fields
Polarized light
Precession
Propagation delay
Pumps
Quantum dots
Online AccessGet full text
ISSN0036-8075
1095-9203
1095-9203
DOI10.1126/science.1128215

Cover

More Information
Summary:The fast dephasing of electron spins in an ensemble of quantum dots is detrimental for applications in quantum information processing. We show here that dephasing can be overcome by using a periodic train of light pulses to synchronize the phases of the precessing spins, and we demonstrate this effect in an ensemble of singly charged (In,Ga)As/GaAs quantum dots. This mode locking leads to constructive interference of contributions to Faraday rotation and presents potential applications based on robust quantum coherence within an ensemble of dots.
Bibliography:http://www.scienceonline.org/
SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 14
ObjectType-Article-2
content type line 23
ObjectType-Article-1
ObjectType-Feature-2
ISSN:0036-8075
1095-9203
1095-9203
DOI:10.1126/science.1128215