Noise-robust exploration of many-body quantum states on near-term quantum devices

Abstract We describe a resource-efficient approach to studying many-body quantum states on noisy, intermediate-scale quantum devices. We employ a sequential generation model that allows us to bound the range of correlations in the resulting many-body quantum states. From this, we characterize situat...

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Autores principales:	Johannes Borregaard, Matthias Christandl, Daniel Stilck França
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/d0eeef7884b047a0bc481d03164d420b
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spelling	oai:doaj.org-article:d0eeef7884b047a0bc481d03164d420b2021-12-02T11:37:20ZNoise-robust exploration of many-body quantum states on near-term quantum devices10.1038/s41534-021-00363-92056-6387https://doaj.org/article/d0eeef7884b047a0bc481d03164d420b2021-03-01T00:00:00Zhttps://doi.org/10.1038/s41534-021-00363-9https://doaj.org/toc/2056-6387Abstract We describe a resource-efficient approach to studying many-body quantum states on noisy, intermediate-scale quantum devices. We employ a sequential generation model that allows us to bound the range of correlations in the resulting many-body quantum states. From this, we characterize situations where the estimation of local observables does not require the preparation of the entire state. Instead smaller patches of the state can be generated from which the observables can be estimated. This can potentially reduce circuit size and number of qubits for the computation of physical properties of the states. Moreover, we show that the effect of noise decreases along the computation. Our results apply to a broad class of widely studied tensor network states and can be directly applied to near-term implementations of variational quantum algorithms.Johannes BorregaardMatthias ChristandlDaniel Stilck FrançaNature PortfolioarticlePhysicsQC1-999Electronic computers. Computer scienceQA75.5-76.95ENnpj Quantum Information, Vol 7, Iss 1, Pp 1-6 (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 Johannes Borregaard Matthias Christandl Daniel Stilck França Noise-robust exploration of many-body quantum states on near-term quantum devices
description	Abstract We describe a resource-efficient approach to studying many-body quantum states on noisy, intermediate-scale quantum devices. We employ a sequential generation model that allows us to bound the range of correlations in the resulting many-body quantum states. From this, we characterize situations where the estimation of local observables does not require the preparation of the entire state. Instead smaller patches of the state can be generated from which the observables can be estimated. This can potentially reduce circuit size and number of qubits for the computation of physical properties of the states. Moreover, we show that the effect of noise decreases along the computation. Our results apply to a broad class of widely studied tensor network states and can be directly applied to near-term implementations of variational quantum algorithms.
format	article
author	Johannes Borregaard Matthias Christandl Daniel Stilck França
author_facet	Johannes Borregaard Matthias Christandl Daniel Stilck França
author_sort	Johannes Borregaard
title	Noise-robust exploration of many-body quantum states on near-term quantum devices
title_short	Noise-robust exploration of many-body quantum states on near-term quantum devices
title_full	Noise-robust exploration of many-body quantum states on near-term quantum devices
title_fullStr	Noise-robust exploration of many-body quantum states on near-term quantum devices
title_full_unstemmed	Noise-robust exploration of many-body quantum states on near-term quantum devices
title_sort	noise-robust exploration of many-body quantum states on near-term quantum devices
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/d0eeef7884b047a0bc481d03164d420b
work_keys_str_mv	AT johannesborregaard noiserobustexplorationofmanybodyquantumstatesonneartermquantumdevices AT matthiaschristandl noiserobustexplorationofmanybodyquantumstatesonneartermquantumdevices AT danielstilckfranca noiserobustexplorationofmanybodyquantumstatesonneartermquantumdevices
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Noise-robust exploration of many-body quantum states on near-term quantum devices

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