Ramsey interference in a multilevel quantum system

Lee, J. P., Bennett, Anthony ORCID: https://orcid.org/0000-0002-5386-3710, Skiba-Szymanska, J., Ellis, D. J. P., Farrer, I., Ritchie, D. A. and Shields, A. J. 2016. Ramsey interference in a multilevel quantum system. Physical Review B 93 (8) , 085407. 10.1103/PhysRevB.93.085407

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Abstract

We report Ramsey interference in the excitonic population of a negatively charged quantum dot measured in resonant fluorescence. 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 two-, three-, and four-level system behavior. 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 states simultaneously. We also demonstrate the coherent optical manipulation of a trapped spin in a quantum dot in a Faraday geometry magnetic field.

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Engineering
Publisher:	American Physical Society
ISSN:	2469-9950
Last Modified:	03 Nov 2022 09:55
URI:	https://orca.cardiff.ac.uk/id/eprint/106430

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