Ramsey Interference in a Multi-level Quantum System
Mesoscale and Nanoscale Physics
2016-05-09 v1 Quantum Physics
Abstract
We report Ramsey interference in the excitonic population of a negatively charged quantum dot revealing the coherence of the state in the limit where radiative decay is dominant. Our experiments show that the decay time of the Ramsey interference is limited by the spectral width of the transition. Applying a vertical magnetic field induces Zeeman split transitions that can be addressed by changing the laser detuning to reveal 2, 3 and 4 level system behaviour. We show that under finite field the phase-sensitive control of two optical pulses from a single laser can be used to prepare both population and spin qubits simultaneously.
Keywords
Cite
@article{arxiv.1508.05749,
title = {Ramsey Interference in a Multi-level Quantum System},
author = {J. P. Lee and A. J. Bennett and J. Skiba-Szymanska and D. J. P. Ellis and I. Farrer and D. A. Ritchie and A. J. Shields},
journal= {arXiv preprint arXiv:1508.05749},
year = {2016}
}