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Trapped Ion Quantum Computing

Ramsey Interference in a Multi-level Quantum System

arXiv

Authors: J. P. Lee, A. J. Bennett, J. Skiba-Szymanska, D. J. P. Ellis, I. Farrer, D. A. Ritchie, A. J. Shields

Year

2015

Paper ID

27657

Status

Preprint

Abstract Read

~2 min

Abstract Words

100

Citations

N/A

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.

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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.

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References & Citation Signals

[1] DOI https://doi.org/arXiv:1508.05749 [2] arXiv https://arxiv.org/abs/1508.05749 [3] Publisher https://arxiv.org/abs/1508.05749

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