Optimal photons for quantum-information processing

Rohde, PP; Ralph, TC; Nielsen, MA

Optimal photons for quantum-information processing

Rohde, PP

Ralph, TC Nielsen, MA

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Publication Type:: Journal Article
Citation:: Physical Review A - Atomic, Molecular, and Optical Physics, 2005, 72 (5)
Issue Date:: 2005-11-01

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Field	Value	Language
dc.contributor.author	Rohde, PP https://orcid.org/0000-0002-5814-7289	en_US
dc.contributor.author	Ralph, TC	en_US
dc.contributor.author	Nielsen, MA	en_US
dc.date.issued	2005-11-01	en_US
dc.identifier.citation	Physical Review A - Atomic, Molecular, and Optical Physics, 2005, 72 (5)	en_US
dc.identifier.issn	1050-2947	en_US
dc.identifier.uri	http://hdl.handle.net/10453/132369
dc.description.abstract	Photonic quantum-information processing schemes, such as linear optics quantum computing, and other experiments relying on single-photon interference, inherently require complete photon indistinguishability to enable the desired photonic interactions to take place. Mode-mismatch is the dominant cause of photon distinguishability in optical circuits. Here we study the effects of photon wave-packet shape on tolerance against the effects of mode mismatch in linear optical circuits, and show that Gaussian distributed photons with large bandwidth are optimal. The result is general and holds for arbitrary linear optical circuits, including ones which allow for postselection and classical feed forward. Our findings indicate that some single photon sources, frequently cited for their potential application to quantum-information processing, may in fact be suboptimal for such applications. © 2005 The American Physical Society.	en_US
dc.relation.ispartof	Physical Review A - Atomic, Molecular, and Optical Physics	en_US
dc.relation.isbasedon	10.1103/PhysRevA.72.052332	en_US
dc.subject.classification	General Physics	en_US
dc.title	Optimal photons for quantum-information processing	en_US
dc.type	Journal Article
utslib.citation.volume	5	en_US
utslib.citation.volume	72	en_US
utslib.for	01 Mathematical Sciences	en_US
utslib.for	02 Physical Sciences	en_US
utslib.for	03 Chemical Sciences	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	closed_access
pubs.issue	5	en_US
pubs.publication-status	Published	en_US
pubs.volume	72	en_US

Abstract:

Photonic quantum-information processing schemes, such as linear optics quantum computing, and other experiments relying on single-photon interference, inherently require complete photon indistinguishability to enable the desired photonic interactions to take place. Mode-mismatch is the dominant cause of photon distinguishability in optical circuits. Here we study the effects of photon wave-packet shape on tolerance against the effects of mode mismatch in linear optical circuits, and show that Gaussian distributed photons with large bandwidth are optimal. The result is general and holds for arbitrary linear optical circuits, including ones which allow for postselection and classical feed forward. Our findings indicate that some single photon sources, frequently cited for their potential application to quantum-information processing, may in fact be suboptimal for such applications. © 2005 The American Physical Society.

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http://hdl.handle.net/10453/132369