https://doi.org/10.1140/epjp/s13360-024-05828-2
Regular Article
In-depth conversion of entangled states for electron-spin systems with error-avoiding parity-check gates
Science and Technology on Electronic Test and Measurement Laboratory, North University of China, 030051, Taiyuan, Shanxi, China
a
Duff@nuc.edu.cn
e
liuwenyao@nuc.edu.cn
Received:
4
June
2024
Accepted:
11
November
2024
Published online:
28
November
2024
Quantum entanglement is crucial for the development of numerous quantum information technologies. In this paper, we introduce two novel schemes, i.e., one for converting the two-electron-spin Knill-Laflamme-Milburn (KLM) entangled state into Bell states, and another for transforming the three-electron-spin KLM state into Greenberger-Horne-Zeilinger (GHZ) states. These conversions leverage error-avoiding parity-check gates (EAPCGs) that utilize interactions between the quantum-dot-cavity system and an auxiliary photon. Moreover, the quantum circuit in the EAPCG facilitates accurate conversion by converting real photon-scattering deviations into failure-heralded detection. Our analysis demonstrates that these conversions achieve unity fidelities and high efficiencies, thereby enhancing the understanding of the fundamental properties of entanglement.
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© The Author(s), under exclusive licence to Società Italiana di Fisica and Springer-Verlag GmbH Germany, part of Springer Nature 2024. 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.
