Counteracting dephasing in Molecular Nanomagnets by optimized qudit encodings

Abstract Molecular Nanomagnets may enable the implementation of qudit-based quantum error-correction codes which exploit the many spin levels naturally embedded in a single molecule, a promising step towards scalable quantum processors. To fully realize the potential of this approach, a microscopic...

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Autores principales:	F. Petiziol, A. Chiesa, S. Wimberger, P. Santini, S. Carretta
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/3e2631a34d9a4b59916aaeaf5e9ac4f9
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spelling	oai:doaj.org-article:3e2631a34d9a4b59916aaeaf5e9ac4f92021-12-02T18:53:18ZCounteracting dephasing in Molecular Nanomagnets by optimized qudit encodings10.1038/s41534-021-00466-32056-6387https://doaj.org/article/3e2631a34d9a4b59916aaeaf5e9ac4f92021-08-01T00:00:00Zhttps://doi.org/10.1038/s41534-021-00466-3https://doaj.org/toc/2056-6387Abstract Molecular Nanomagnets may enable the implementation of qudit-based quantum error-correction codes which exploit the many spin levels naturally embedded in a single molecule, a promising step towards scalable quantum processors. To fully realize the potential of this approach, a microscopic understanding of the errors corrupting the quantum information encoded in a molecular qudit is essential, together with the development of tailor-made quantum error correction strategies. We address these central points by first studying dephasing effects on the molecular spin qudit produced by the interaction with surrounding nuclear spins, which are the dominant source of errors at low temperatures. Numerical quantum error correction codes are then constructed, by means of a systematic optimization procedure based on simulations of the coupled system-bath dynamics, that provide a striking enhancement of the coherence time of the molecular computational unit. The sequence of pulses needed for the experimental implementation of the codes is finally proposed.F. PetiziolA. ChiesaS. WimbergerP. SantiniS. CarrettaNature PortfolioarticlePhysicsQC1-999Electronic computers. Computer scienceQA75.5-76.95ENnpj Quantum Information, Vol 7, Iss 1, Pp 1-10 (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 F. Petiziol A. Chiesa S. Wimberger P. Santini S. Carretta Counteracting dephasing in Molecular Nanomagnets by optimized qudit encodings
description	Abstract Molecular Nanomagnets may enable the implementation of qudit-based quantum error-correction codes which exploit the many spin levels naturally embedded in a single molecule, a promising step towards scalable quantum processors. To fully realize the potential of this approach, a microscopic understanding of the errors corrupting the quantum information encoded in a molecular qudit is essential, together with the development of tailor-made quantum error correction strategies. We address these central points by first studying dephasing effects on the molecular spin qudit produced by the interaction with surrounding nuclear spins, which are the dominant source of errors at low temperatures. Numerical quantum error correction codes are then constructed, by means of a systematic optimization procedure based on simulations of the coupled system-bath dynamics, that provide a striking enhancement of the coherence time of the molecular computational unit. The sequence of pulses needed for the experimental implementation of the codes is finally proposed.
format	article
author	F. Petiziol A. Chiesa S. Wimberger P. Santini S. Carretta
author_facet	F. Petiziol A. Chiesa S. Wimberger P. Santini S. Carretta
author_sort	F. Petiziol
title	Counteracting dephasing in Molecular Nanomagnets by optimized qudit encodings
title_short	Counteracting dephasing in Molecular Nanomagnets by optimized qudit encodings
title_full	Counteracting dephasing in Molecular Nanomagnets by optimized qudit encodings
title_fullStr	Counteracting dephasing in Molecular Nanomagnets by optimized qudit encodings
title_full_unstemmed	Counteracting dephasing in Molecular Nanomagnets by optimized qudit encodings
title_sort	counteracting dephasing in molecular nanomagnets by optimized qudit encodings
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/3e2631a34d9a4b59916aaeaf5e9ac4f9
work_keys_str_mv	AT fpetiziol counteractingdephasinginmolecularnanomagnetsbyoptimizedquditencodings AT achiesa counteractingdephasinginmolecularnanomagnetsbyoptimizedquditencodings AT swimberger counteractingdephasinginmolecularnanomagnetsbyoptimizedquditencodings AT psantini counteractingdephasinginmolecularnanomagnetsbyoptimizedquditencodings AT scarretta counteractingdephasinginmolecularnanomagnetsbyoptimizedquditencodings
_version_	1718377321150283776

Counteracting dephasing in Molecular Nanomagnets by optimized qudit encodings

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