| DOI | Trouver le DOI : https://doi.org/10.1103/PhysRevB.111.115403 |
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| Auteur | Rechercher : Allami, HassanIdentifiant ORCID : https://orcid.org/0000-0003-2859-7489; Rechercher : Miravet, DanielIdentifiant ORCID : https://orcid.org/0000-0002-2908-4645; Rechercher : Korkusinski, Marek1Identifiant ORCID : https://orcid.org/0000-0002-2238-336X; Rechercher : Hawrylak, Pawel |
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| Affiliation | - Conseil national de recherches Canada. Technologies de sécurité et de rupture
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| Bailleur de fonds | Rechercher : National Research Council Canada |
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| Format | Texte, Article |
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| Résumé | We present a theory of a two-qubit gate with macroscopic singlet-triplet (ST) qubits in synthetic spin-one chains in InAsP quantum dot nanowires. The macroscopic topologically protected singlet-triplet qubits are built with two spin-half Haldane quasiparticles. The Haldane quasiparticles are hosted by a synthetic spin-one chain realized in chains of InAsP quantum dots embedded in an InP nanowire, with four electrons each. The quantum dot nanowire is described by a Hubbard-Kanamori (HK) Hamiltonian derived from an interacting atomistic model. Using exact diagonalization and matrix product states tools, we demonstrate that the low-energy behavior of the HK Hamiltonian is effectively captured by an antiferromagnetic spin-one chain Hamiltonian. Next, we consider two macroscopic qubits and present a method for creating a tunable coupling between the two macroscopic qubits by inserting an intermediate control dot between the two chains. Finally, we propose and demonstrate two approaches for generating highly accurate two-ST qubit gates: (1) by controlling the length of each qubit and (2) by employing different background magnetic fields for the two qubits. |
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| Date de publication | 2025-03-05 |
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| Maison d’édition | American Physical Society |
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| Dans | |
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| Langue | anglais |
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| Publications évaluées par des pairs | Oui |
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| Exporter la notice | Exporter en format RIS |
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| Signaler une correction | Signaler une correction (s'ouvre dans un nouvel onglet) |
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| Identificateur de l’enregistrement | 9a8ab8c6-b5df-4c5d-8c98-4645cc02b94d |
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| Enregistrement créé | 2025-07-08 |
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| Enregistrement modifié | 2025-11-03 |
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