Probabilistic teleportation of a quantum dot spin qubit

Abstract Electron spins in semiconductor quantum dots have been intensively studied for implementing quantum computation and high-fidelity single- and two-qubit operations have recently been achieved. Quantum teleportation is a three-qubit protocol exploiting quantum entanglement and it serves as an...

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Autores principales:	Y. Kojima, T. Nakajima, A. Noiri, J. Yoneda, T. Otsuka, K. Takeda, S. Li, S. D. Bartlett, A. Ludwig, A. D. Wieck, S. Tarucha
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Physics QC1-999 Electronic computers. Computer science QA75.5-76.95
Acceso en línea:	https://doaj.org/article/6d5c99bc3bad457d8862caf6fabdfa94
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spelling	oai:doaj.org-article:6d5c99bc3bad457d8862caf6fabdfa942021-12-02T14:49:44ZProbabilistic teleportation of a quantum dot spin qubit10.1038/s41534-021-00403-42056-6387https://doaj.org/article/6d5c99bc3bad457d8862caf6fabdfa942021-05-01T00:00:00Zhttps://doi.org/10.1038/s41534-021-00403-4https://doaj.org/toc/2056-6387Abstract Electron spins in semiconductor quantum dots have been intensively studied for implementing quantum computation and high-fidelity single- and two-qubit operations have recently been achieved. Quantum teleportation is a three-qubit protocol exploiting quantum entanglement and it serves as an essential primitive for more sophisticated quantum algorithms. Here we demonstrate a scheme for quantum teleportation based on direct Bell measurement for a single-electron spin qubit in a triple quantum dot utilizing the Pauli exclusion principle to create and detect maximally entangled states. The single spin polarization is teleported from the input qubit to the output qubit. We find this fidelity is primarily limited by singlet–triplet mixing, which can be improved by optimizing the device parameters. Our results may be extended to quantum algorithms with a larger number of semiconductor spin qubits.Y. KojimaT. NakajimaA. NoiriJ. YonedaT. OtsukaK. TakedaS. LiS. D. BartlettA. LudwigA. D. WieckS. TaruchaNature PortfolioarticlePhysicsQC1-999Electronic computers. Computer scienceQA75.5-76.95ENnpj Quantum Information, Vol 7, Iss 1, Pp 1-6 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Physics QC1-999 Electronic computers. Computer science QA75.5-76.95
spellingShingle	Physics QC1-999 Electronic computers. Computer science QA75.5-76.95 Y. Kojima T. Nakajima A. Noiri J. Yoneda T. Otsuka K. Takeda S. Li S. D. Bartlett A. Ludwig A. D. Wieck S. Tarucha Probabilistic teleportation of a quantum dot spin qubit
description	Abstract Electron spins in semiconductor quantum dots have been intensively studied for implementing quantum computation and high-fidelity single- and two-qubit operations have recently been achieved. Quantum teleportation is a three-qubit protocol exploiting quantum entanglement and it serves as an essential primitive for more sophisticated quantum algorithms. Here we demonstrate a scheme for quantum teleportation based on direct Bell measurement for a single-electron spin qubit in a triple quantum dot utilizing the Pauli exclusion principle to create and detect maximally entangled states. The single spin polarization is teleported from the input qubit to the output qubit. We find this fidelity is primarily limited by singlet–triplet mixing, which can be improved by optimizing the device parameters. Our results may be extended to quantum algorithms with a larger number of semiconductor spin qubits.
format	article
author	Y. Kojima T. Nakajima A. Noiri J. Yoneda T. Otsuka K. Takeda S. Li S. D. Bartlett A. Ludwig A. D. Wieck S. Tarucha
author_facet	Y. Kojima T. Nakajima A. Noiri J. Yoneda T. Otsuka K. Takeda S. Li S. D. Bartlett A. Ludwig A. D. Wieck S. Tarucha
author_sort	Y. Kojima
title	Probabilistic teleportation of a quantum dot spin qubit
title_short	Probabilistic teleportation of a quantum dot spin qubit
title_full	Probabilistic teleportation of a quantum dot spin qubit
title_fullStr	Probabilistic teleportation of a quantum dot spin qubit
title_full_unstemmed	Probabilistic teleportation of a quantum dot spin qubit
title_sort	probabilistic teleportation of a quantum dot spin qubit
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/6d5c99bc3bad457d8862caf6fabdfa94
work_keys_str_mv	AT ykojima probabilisticteleportationofaquantumdotspinqubit AT tnakajima probabilisticteleportationofaquantumdotspinqubit AT anoiri probabilisticteleportationofaquantumdotspinqubit AT jyoneda probabilisticteleportationofaquantumdotspinqubit AT totsuka probabilisticteleportationofaquantumdotspinqubit AT ktakeda probabilisticteleportationofaquantumdotspinqubit AT sli probabilisticteleportationofaquantumdotspinqubit AT sdbartlett probabilisticteleportationofaquantumdotspinqubit AT aludwig probabilisticteleportationofaquantumdotspinqubit AT adwieck probabilisticteleportationofaquantumdotspinqubit AT starucha probabilisticteleportationofaquantumdotspinqubit
_version_	1718389450857250816

Probabilistic teleportation of a quantum dot spin qubit

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