Quantifying Magnetic Sensitivity of Radical Pair Based Compass by Quantum Fisher Information

Abstract The radical pair (RP) based compass is considered as one of the principal models of avian magnetoreception. Different from the conventional approach where the sensitivity of RP based compass is described by the singlet yield, we introduce the quantum Fisher information (QFI), which represen...

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Autores principales:	Li-Sha Guo, Bao-Ming Xu, Jian Zou, Bin Shao
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/a69e01aeebb64d35949bbe0f599487c0
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spelling	oai:doaj.org-article:a69e01aeebb64d35949bbe0f599487c02021-12-02T11:40:30ZQuantifying Magnetic Sensitivity of Radical Pair Based Compass by Quantum Fisher Information10.1038/s41598-017-06187-y2045-2322https://doaj.org/article/a69e01aeebb64d35949bbe0f599487c02017-07-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-06187-yhttps://doaj.org/toc/2045-2322Abstract The radical pair (RP) based compass is considered as one of the principal models of avian magnetoreception. Different from the conventional approach where the sensitivity of RP based compass is described by the singlet yield, we introduce the quantum Fisher information (QFI), which represents the maximum information about the magnetic field’s direction extracted from the RP state, to quantify the sensitivity of RP based compass. The consistency between our results and experimental observations suggests that the QFI may serve as a measure to describe the sensitivity of RP based compass. Besides, within the framework of quantum metrology, we give two specific possible measurement schemes and find that the conventional singlet yield is corresponding to the measurement of total angular momentum. Moreover, we show that the measurement of fluctuation of the total magnetic moment is much more accurate than the singlet yield measurement, and is close to the optimal measurement scheme. Finally, the effects of entanglement and decoherence are also discussed in the spirit of our approach.Li-Sha GuoBao-Ming XuJian ZouBin ShaoNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-8 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Li-Sha Guo Bao-Ming Xu Jian Zou Bin Shao Quantifying Magnetic Sensitivity of Radical Pair Based Compass by Quantum Fisher Information
description	Abstract The radical pair (RP) based compass is considered as one of the principal models of avian magnetoreception. Different from the conventional approach where the sensitivity of RP based compass is described by the singlet yield, we introduce the quantum Fisher information (QFI), which represents the maximum information about the magnetic field’s direction extracted from the RP state, to quantify the sensitivity of RP based compass. The consistency between our results and experimental observations suggests that the QFI may serve as a measure to describe the sensitivity of RP based compass. Besides, within the framework of quantum metrology, we give two specific possible measurement schemes and find that the conventional singlet yield is corresponding to the measurement of total angular momentum. Moreover, we show that the measurement of fluctuation of the total magnetic moment is much more accurate than the singlet yield measurement, and is close to the optimal measurement scheme. Finally, the effects of entanglement and decoherence are also discussed in the spirit of our approach.
format	article
author	Li-Sha Guo Bao-Ming Xu Jian Zou Bin Shao
author_facet	Li-Sha Guo Bao-Ming Xu Jian Zou Bin Shao
author_sort	Li-Sha Guo
title	Quantifying Magnetic Sensitivity of Radical Pair Based Compass by Quantum Fisher Information
title_short	Quantifying Magnetic Sensitivity of Radical Pair Based Compass by Quantum Fisher Information
title_full	Quantifying Magnetic Sensitivity of Radical Pair Based Compass by Quantum Fisher Information
title_fullStr	Quantifying Magnetic Sensitivity of Radical Pair Based Compass by Quantum Fisher Information
title_full_unstemmed	Quantifying Magnetic Sensitivity of Radical Pair Based Compass by Quantum Fisher Information
title_sort	quantifying magnetic sensitivity of radical pair based compass by quantum fisher information
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/a69e01aeebb64d35949bbe0f599487c0
work_keys_str_mv	AT lishaguo quantifyingmagneticsensitivityofradicalpairbasedcompassbyquantumfisherinformation AT baomingxu quantifyingmagneticsensitivityofradicalpairbasedcompassbyquantumfisherinformation AT jianzou quantifyingmagneticsensitivityofradicalpairbasedcompassbyquantumfisherinformation AT binshao quantifyingmagneticsensitivityofradicalpairbasedcompassbyquantumfisherinformation
_version_	1718395599655534592

Quantifying Magnetic Sensitivity of Radical Pair Based Compass by Quantum Fisher Information

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