Coherent manipulation and quantum phase interference in a fullerene-based electron triplet molecular qutrit

Abstract High-spin magnetic molecules are promising candidates for quantum information processing because their intrinsic multiplicity facilitates information storage and computational operations. However, due to the absence of suitable sublevel splittings, their susceptibility to environmental dist...

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Autores principales:	Ye-Xin Wang, Zheng Liu, Yu-Hui Fang, Shen Zhou, Shang-Da Jiang, Song Gao
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/5eff3b9915e24ccf819540436cd82a2d
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spelling	oai:doaj.org-article:5eff3b9915e24ccf819540436cd82a2d2021-12-02T14:21:51ZCoherent manipulation and quantum phase interference in a fullerene-based electron triplet molecular qutrit10.1038/s41534-021-00362-w2056-6387https://doaj.org/article/5eff3b9915e24ccf819540436cd82a2d2021-02-01T00:00:00Zhttps://doi.org/10.1038/s41534-021-00362-whttps://doaj.org/toc/2056-6387Abstract High-spin magnetic molecules are promising candidates for quantum information processing because their intrinsic multiplicity facilitates information storage and computational operations. However, due to the absence of suitable sublevel splittings, their susceptibility to environmental disturbances and limitation from the selection rule, the arbitrary control of the quantum state of a molecular electron multiplet has not been realized. Here, we exploit the photoexcited triplet of C70 as a molecular electron spin qutrit with pulsed electron paramagnetic resonance. We prepared the system into 3-level superposition states characteristic of a qutrit and validated them by the tomography of their density matrices. To further elucidate the coherence of the operation and the nature of the system as a qutrit, we demonstrated the quantum phase interference in the superposition. The interference pattern is further interpreted as a map of possible evolution paths in the space of phase factors, representing the quantum nature of the 3-level system.Ye-Xin WangZheng LiuYu-Hui FangShen ZhouShang-Da JiangSong GaoNature PortfolioarticlePhysicsQC1-999Electronic computers. Computer scienceQA75.5-76.95ENnpj Quantum Information, Vol 7, Iss 1, Pp 1-8 (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 Ye-Xin Wang Zheng Liu Yu-Hui Fang Shen Zhou Shang-Da Jiang Song Gao Coherent manipulation and quantum phase interference in a fullerene-based electron triplet molecular qutrit
description	Abstract High-spin magnetic molecules are promising candidates for quantum information processing because their intrinsic multiplicity facilitates information storage and computational operations. However, due to the absence of suitable sublevel splittings, their susceptibility to environmental disturbances and limitation from the selection rule, the arbitrary control of the quantum state of a molecular electron multiplet has not been realized. Here, we exploit the photoexcited triplet of C70 as a molecular electron spin qutrit with pulsed electron paramagnetic resonance. We prepared the system into 3-level superposition states characteristic of a qutrit and validated them by the tomography of their density matrices. To further elucidate the coherence of the operation and the nature of the system as a qutrit, we demonstrated the quantum phase interference in the superposition. The interference pattern is further interpreted as a map of possible evolution paths in the space of phase factors, representing the quantum nature of the 3-level system.
format	article
author	Ye-Xin Wang Zheng Liu Yu-Hui Fang Shen Zhou Shang-Da Jiang Song Gao
author_facet	Ye-Xin Wang Zheng Liu Yu-Hui Fang Shen Zhou Shang-Da Jiang Song Gao
author_sort	Ye-Xin Wang
title	Coherent manipulation and quantum phase interference in a fullerene-based electron triplet molecular qutrit
title_short	Coherent manipulation and quantum phase interference in a fullerene-based electron triplet molecular qutrit
title_full	Coherent manipulation and quantum phase interference in a fullerene-based electron triplet molecular qutrit
title_fullStr	Coherent manipulation and quantum phase interference in a fullerene-based electron triplet molecular qutrit
title_full_unstemmed	Coherent manipulation and quantum phase interference in a fullerene-based electron triplet molecular qutrit
title_sort	coherent manipulation and quantum phase interference in a fullerene-based electron triplet molecular qutrit
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/5eff3b9915e24ccf819540436cd82a2d
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Coherent manipulation and quantum phase interference in a fullerene-based electron triplet molecular qutrit

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