https://doi.org/10.1140/epjp/s13360-023-03652-8
Regular Article
Quantum entanglement between a hole spin confined to a semiconductor quantum dot and a photon
1
Faculty of Physics, University of Tabriz, Tabriz, Iran
2
Institute of Theoretical Physics and Astronomy, Vilnius University, Saulėtekio 3, 10257, Vilnius, Lithuania
Received:
16
January
2022
Accepted:
2
January
2023
Published online:
24
January
2023
We demonstrate quantum entanglement between a single hole spin confined to a positively charged semiconductor quantum dot (QD) and a photon spontaneously emitted from the matter’s excited state. The QD system is in the Voigt geometry with two ground hole spin states and two excited trion states. We consider the light-matter coupling initially prepared in one of the ground hole spin states. For very weak Rabi frequencies, the spin-flip process transfers most of the population to another hole spin state, leading to the disentanglement between the single photon and single QD hole spin. A maximum entanglement is achieved by increasing the intensity of Rabi frequencies. In this case, the population almost equally distributes among all the bare quantum states. Our results may pave the way toward creating a scalable QD quantum computing architecture relying on the photon as flying qubits to mediate entanglement between distant nodes of a QD network.
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© The Author(s), under exclusive licence to Società Italiana di Fisica and Springer-Verlag GmbH Germany, part of Springer Nature 2023. Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.
