Towards Photon-Number-Encoded High-dimensional Entanglement from a Sequentially Excited Quantum Three-Level System
Abstract
The sequential resonant excitation of a 2-level quantum system results in the emission of a state of light showing time-entanglement encoded in the photon-number-basis - notions that can be extended to 3-level quantum systems as discussed in a recent proposal. Here, we report the experimental implementation of a sequential two-photon resonant excitation process of a solid-state 3-level system, constituted by the biexciton-, exciton-, and ground-state of a semiconductor quantum dot. The resulting light state exhibits entanglement in time and energy, encoded in the photon-number basis, which could be used in quantum information applications, e.g., dense information encoding or quantum communication protocols. Performing energy- and time-resolved correlation experiments in combination with extensive theoretical modelling, we are able to partially retrieve the entanglement structure of the generated state.
Cite
@article{arxiv.2407.05902,
title = {Towards Photon-Number-Encoded High-dimensional Entanglement from a Sequentially Excited Quantum Three-Level System},
author = {Daniel A. Vajner and Nils D. Kewitz and Martin von Helversen and Stephen C. Wein and Yusuf Karli and Florian Kappe and Vikas Remesh and Saimon F. Covre da Silva and Armando Rastelli and Gregor Weihs and Carlos Anton-Solanas and Tobias Heindel},
journal= {arXiv preprint arXiv:2407.05902},
year = {2025}
}
Comments
14 pages (including 5 figures, 56 citations)