Mode Locking of Electron Spin Coherences in Singly Charged Quantum Dots
Abstract
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.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Jul 21, 2006
- Source ID
- 10.1126/science.1128215
Entities
People
- A. Greilich
- A. Wieck
- Al. L. Efros
- Andrew R. Shabaev
- D. R. Yakovlev
- D. Reuter
- I. A. Yugova
- M. Bayer
- R. Oulton
- V. Stavarache
Organizations
- George Mason University
- Ioffe Institute
- Saint Petersburg State University
- Technical University of Dortmund
- United States Naval Research Laboratory