Weak-value amplification: state of play

Knee, GC; Combes, J; Ferrie, C; Gauger, EM

Weak-value amplification: state of play

Knee, GC Combes, J Ferrie, C

Gauger, EM

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Publisher:: De Gruyter Open
Publication Type:: Journal Article
Citation:: Quantum Measurements and Quantum Metrology, 2016, 3 (1), pp. 32 - 37
Issue Date:: 2016-01-01

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Field	Value	Language
dc.contributor.author	Knee, GC	en_US
dc.contributor.author	Combes, J	en_US
dc.contributor.author	Ferrie, C https://orcid.org/0000-0003-2736-9943	en_US
dc.contributor.author	Gauger, EM	en_US
dc.date.issued	2016-01-01	en_US
dc.identifier.citation	Quantum Measurements and Quantum Metrology, 2016, 3 (1), pp. 32 - 37	en_US
dc.identifier.issn	2299-114X	en_US
dc.identifier.uri	http://hdl.handle.net/10453/105871
dc.description.abstract	Weak values arise in quantum theory when the result of a weak measurement is conditioned on a subsequent strong measurement. The majority of the trials are discarded, leaving only very few successful events. Intriguingly those can display a substantial signal ampli cation. This raises the question of whether weak values carry potential to improve the performance of quantum sensors, and indeed a number of impressive experimental results suggested this may be the case. By contrast, recent theoretical studies have found the opposite: using weak-values to obtain an ampli cation generally worsens metrological performance. This survey summarises the implications of those studies, which call for a reappraisal of weak values’ utility and for further work to reconcile theory and experiment.	en_US
dc.publisher	De Gruyter Open	en_US
dc.relation.ispartof	Quantum Measurements and Quantum Metrology	en_US
dc.relation.isbasedon	10.1515/qmetro-2016-0006	en_US
dc.title	Weak-value amplification: state of play	en_US
dc.type	Journal Article
utslib.citation.volume	1	en_US
utslib.citation.volume	3	en_US
utslib.for	0206 Quantum Physics	en_US
pubs.embargo.period	Not known	en_US
pubs.organisational-group	/University of Technology Sydney
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology
pubs.organisational-group	/University of Technology Sydney/Strength - QSI - Centre for Quantum Software and Information
utslib.copyright.status	open_access
pubs.consider-herdc	true	en_US
pubs.issue	1	en_US
pubs.publication-status	Published	en_US
pubs.volume	3	en_US

Abstract:

Weak values arise in quantum theory when the result of a weak measurement is conditioned on a subsequent strong measurement. The majority of the trials are discarded, leaving only very few successful events. Intriguingly those can display a substantial signal ampli cation. This raises the question of whether weak values carry potential to improve the performance of quantum sensors, and indeed a number of impressive experimental results suggested this may be the case. By contrast, recent theoretical studies have found the opposite: using weak-values to obtain an ampli cation generally worsens metrological performance. This survey summarises the implications of those studies, which call for a reappraisal of weak values’ utility and for further work to reconcile theory and experiment.

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http://hdl.handle.net/10453/105871