High-fidelity entangling gate for double-quantum-dot spin qubits

Quantum computing: high-fidelity two-qubit entangling gate Scientists have invented a new way to entangle electron spins. Entanglement, or “spooky action at a distance,” is one of the key requirements for a universal quantum computer, because it enables the transfer of information between quantum bi...

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Autores principales:	John M. Nichol, Lucas A. Orona, Shannon P. Harvey, Saeed Fallahi, Geoffrey C. Gardner, Michael J. Manfra, Amir Yacoby
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Physics QC1-999 Electronic computers. Computer science QA75.5-76.95
Acceso en línea:	https://doaj.org/article/fcc75c9f610d4cb1adac4c46b63da340
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spelling	oai:doaj.org-article:fcc75c9f610d4cb1adac4c46b63da3402021-12-02T12:33:55ZHigh-fidelity entangling gate for double-quantum-dot spin qubits10.1038/s41534-016-0003-12056-6387https://doaj.org/article/fcc75c9f610d4cb1adac4c46b63da3402017-01-01T00:00:00Zhttps://doi.org/10.1038/s41534-016-0003-1https://doaj.org/toc/2056-6387Quantum computing: high-fidelity two-qubit entangling gate Scientists have invented a new way to entangle electron spins. Entanglement, or “spooky action at a distance,” is one of the key requirements for a universal quantum computer, because it enables the transfer of information between quantum bits, or qubits. For qubits consisting of electron spins trapped in semiconductors, the Coulomb interaction between electrons can be harnessed to create entanglement. In this approach, however, the coherence of the individual spins is susceptible to spurious charge noise in the semiconductor. Amir Yacoby and colleagues at Harvard University and Purdue University overcame this challenge by using a large magnetic field gradient in a double-quantum-dot spin qubit to suppress the effects charge noise. By mitigating charge-noise-induced decoherence, the team demonstrated a two-qubit entangling gate fidelity of 90%. This high-fidelity entangling operation marks a significant milestone for spin qubits and points the way toward a scalable high-fidelity spin-based quantum computer.John M. NicholLucas A. OronaShannon P. HarveySaeed FallahiGeoffrey C. GardnerMichael J. ManfraAmir YacobyNature PortfolioarticlePhysicsQC1-999Electronic computers. Computer scienceQA75.5-76.95ENnpj Quantum Information, Vol 3, Iss 1, Pp 1-5 (2017)
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 John M. Nichol Lucas A. Orona Shannon P. Harvey Saeed Fallahi Geoffrey C. Gardner Michael J. Manfra Amir Yacoby High-fidelity entangling gate for double-quantum-dot spin qubits
description	Quantum computing: high-fidelity two-qubit entangling gate Scientists have invented a new way to entangle electron spins. Entanglement, or “spooky action at a distance,” is one of the key requirements for a universal quantum computer, because it enables the transfer of information between quantum bits, or qubits. For qubits consisting of electron spins trapped in semiconductors, the Coulomb interaction between electrons can be harnessed to create entanglement. In this approach, however, the coherence of the individual spins is susceptible to spurious charge noise in the semiconductor. Amir Yacoby and colleagues at Harvard University and Purdue University overcame this challenge by using a large magnetic field gradient in a double-quantum-dot spin qubit to suppress the effects charge noise. By mitigating charge-noise-induced decoherence, the team demonstrated a two-qubit entangling gate fidelity of 90%. This high-fidelity entangling operation marks a significant milestone for spin qubits and points the way toward a scalable high-fidelity spin-based quantum computer.
format	article
author	John M. Nichol Lucas A. Orona Shannon P. Harvey Saeed Fallahi Geoffrey C. Gardner Michael J. Manfra Amir Yacoby
author_facet	John M. Nichol Lucas A. Orona Shannon P. Harvey Saeed Fallahi Geoffrey C. Gardner Michael J. Manfra Amir Yacoby
author_sort	John M. Nichol
title	High-fidelity entangling gate for double-quantum-dot spin qubits
title_short	High-fidelity entangling gate for double-quantum-dot spin qubits
title_full	High-fidelity entangling gate for double-quantum-dot spin qubits
title_fullStr	High-fidelity entangling gate for double-quantum-dot spin qubits
title_full_unstemmed	High-fidelity entangling gate for double-quantum-dot spin qubits
title_sort	high-fidelity entangling gate for double-quantum-dot spin qubits
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/fcc75c9f610d4cb1adac4c46b63da340
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High-fidelity entangling gate for double-quantum-dot spin qubits

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