Adaptive quantum state tomography improves accuracy quadratically

Mahler, DH; Rozema, LA; Darabi, A; Ferrie, C; Blume-Kohout, R; Steinberg, AM

Adaptive quantum state tomography improves accuracy quadratically

Mahler, DH Rozema, LA Darabi, A Ferrie, C

Blume-Kohout, R Steinberg, AM

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Publication Type:: Journal Article
Citation:: Physical Review Letters, 2013, 111 (18)
Issue Date:: 2013-10-29

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Field	Value	Language
dc.contributor.author	Mahler, DH	en_US
dc.contributor.author	Rozema, LA	en_US
dc.contributor.author	Darabi, A	en_US
dc.contributor.author	Ferrie, C https://orcid.org/0000-0003-2736-9943	en_US
dc.contributor.author	Blume-Kohout, R	en_US
dc.contributor.author	Steinberg, AM	en_US
dc.date.issued	2013-10-29	en_US
dc.identifier.citation	Physical Review Letters, 2013, 111 (18)	en_US
dc.identifier.issn	0031-9007	en_US
dc.identifier.uri	http://hdl.handle.net/10453/117415
dc.description.abstract	We introduce a simple protocol for adaptive quantum state tomography, which reduces the worst-case infidelity [1-F(ρρ)] between the estimate and the true state from O(1/√N) to O(1/N). It uses a single adaptation step and just one extra measurement setting. In a linear optical qubit experiment, we demonstrate a full order of magnitude reduction in infidelity (from 0.1% to 0.01%) for a modest number of samples (N≈3×104). © 2013 American Physical Society.	en_US
dc.relation.ispartof	Physical Review Letters	en_US
dc.relation.isbasedon	10.1103/PhysRevLett.111.183601	en_US
dc.subject.classification	General Physics	en_US
dc.title	Adaptive quantum state tomography improves accuracy quadratically	en_US
dc.type	Journal Article
utslib.citation.volume	18	en_US
utslib.citation.volume	111	en_US
utslib.for	0206 Quantum Physics	en_US
utslib.for	01 Mathematical Sciences	en_US
utslib.for	02 Physical Sciences	en_US
utslib.for	09 Engineering	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.issue	18	en_US
pubs.publication-status	Published	en_US
pubs.volume	111	en_US

Abstract:

We introduce a simple protocol for adaptive quantum state tomography, which reduces the worst-case infidelity [1-F(ρρ)] between the estimate and the true state from O(1/√N) to O(1/N). It uses a single adaptation step and just one extra measurement setting. In a linear optical qubit experiment, we demonstrate a full order of magnitude reduction in infidelity (from 0.1% to 0.01%) for a modest number of samples (N≈3×104). © 2013 American Physical Society.

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http://hdl.handle.net/10453/117415