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Near-Landauer-Bound quantum computing using single spins

Wang, Frank Z. (2023) Near-Landauer-Bound quantum computing using single spins. IEEE Transactions on Quantum Engineering, . Article Number TQE.2023.3. ISSN 2689-1808. E-ISSN 2689-1808. (doi:10.1109/TQE.2023.3269039) (KAR id:101162)

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This study is the first experimental verification of Landauer's bound on a single spin, which is the smallest information carrier in size. We used four experiments (single spin experiment, giant spin experiment, nanomagnet experiment and Stern-Gerlach experiment) to demonstrate that a single spin was much more energy-efficient than other information carriers due to its small size and weak coupling with the surroundings. We conclude that quantum spintronics, with single spins as qubits, is an energy-efficient computing paradigm that requires the smallest amount of energy (〖1.2×10〗^(-26) J per spin qubit, close to the theoretical Landauer bound of 〖9.6×10〗^(-27) J at 1 mK), to perform computations.

Item Type: Article
DOI/Identification number: 10.1109/TQE.2023.3269039
Uncontrolled keywords: adiabatic quantum computer; computing engineering; Landauer’s bound; perturbation theory; quantum spin electronics (spintronics); quantum spin tunnelling; qubit; Stern–Gerlach experiment
Subjects: Q Science > QA Mathematics (inc Computing science) > QA 75 Electronic computers. Computer science
Q Science > QC Physics > QC174.12 Quantum theory
Divisions: Divisions > Division of Computing, Engineering and Mathematical Sciences > School of Computing
Funders: European Research Council (
Depositing User: Frank Wang
Date Deposited: 05 May 2023 03:00 UTC
Last Modified: 08 Jan 2024 20:34 UTC
Resource URI: (The current URI for this page, for reference purposes)

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