Noise reduction of multimode Gaussian-boson-sampling circuits via unitary averaging

Swain, SN; Marshman, RJ; Solntsev, AS; Ralph, TC

Noise reduction of multimode Gaussian-boson-sampling circuits via unitary averaging

Swain, SN Marshman, RJ Solntsev, AS Ralph, TC

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Publisher:: AMER PHYSICAL SOC
Publication Type:: Journal Article
Citation:: Physical Review A, 2025, 112, (4), pp. 1-14
Issue Date:: 2025-10-20

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Field	Value	Language
dc.contributor.author	Swain, SN
dc.contributor.author	Marshman, RJ
dc.contributor.author	Solntsev, AS
dc.contributor.author	Ralph, TC
dc.date.accessioned	2026-02-19T01:26:05Z
dc.date.available	2025-09-24
dc.date.available	2026-02-19T01:26:05Z
dc.date.issued	2025-10-20
dc.identifier.citation	Physical Review A, 2025, 112, (4), pp. 1-14
dc.identifier.issn	2469-9926
dc.identifier.issn	2469-9934
dc.identifier.uri	http://hdl.handle.net/10453/193630
dc.description.abstract	We improve Gaussian-boson-sampling circuits by integrating the unitary-averaging (UA) protocol, previously demonstrated to protect unknown Gaussian states from phase errors [Swain et al., Phys. Rev. A 110, 032622 (2024)]. Our work extends the applicability of UA to mitigate arbitrary interferometric noise, including beam-splitter and phase-shifter imperfections. Through comprehensive numerical analysis, we demonstrate that UA consistently achieves higher fidelity and success probability than unprotected circuits, establishing its robustness in noisy conditions. Remarkably, enhancement is maintained across varying numbers of modes with respect to the noise. We further derive a power-law formula predicting performance gains in large-scale systems, including 100-mode and 216-mode configurations. A detailed step-by-step algorithm for implementing the UA protocol is also provided, offering a practical road map for advancing near-term quantum technologies.
dc.language	English
dc.publisher	AMER PHYSICAL SOC
dc.relation	http://purl.org/au-research/grants/arc/CE170100012
dc.relation.ispartof	Physical Review A
dc.relation.isbasedon	10.1103/n9nc-xcmr
dc.rights	info:eu-repo/semantics/openAccess
dc.rights	S Nibedita Swain; Ryan J. Marshman; Alexander S. Solntsev; Timothy C. Ralph, Physical Review A 112, (042611), 20 October 2025. Copyright 2025 by the American Physical Society
dc.subject.classification	34 Chemical sciences
dc.subject.classification	49 Mathematical sciences
dc.subject.classification	51 Physical sciences
dc.title	Noise reduction of multimode Gaussian-boson-sampling circuits via unitary averaging
dc.type	Journal Article
utslib.citation.volume	112
pubs.organisational-group	University of Technology Sydney
pubs.organisational-group	University of Technology Sydney/Faculty of Science
pubs.organisational-group	University of Technology Sydney/Faculty of Science/School of Mathematical and Physical Sciences
pubs.organisational-group	University of Technology Sydney/Faculty of Science/Science Related HDR Students
utslib.copyright.status	open_access	*
dc.date.updated	2026-02-19T01:26:03Z
pubs.issue	4
pubs.publication-status	Published
pubs.volume	112
utslib.citation.issue	4

Abstract:

We improve Gaussian-boson-sampling circuits by integrating the unitary-averaging (UA) protocol, previously demonstrated to protect unknown Gaussian states from phase errors [Swain et al., Phys. Rev. A 110, 032622 (2024)]. Our work extends the applicability of UA to mitigate arbitrary interferometric noise, including beam-splitter and phase-shifter imperfections. Through comprehensive numerical analysis, we demonstrate that UA consistently achieves higher fidelity and success probability than unprotected circuits, establishing its robustness in noisy conditions. Remarkably, enhancement is maintained across varying numbers of modes with respect to the noise. We further derive a power-law formula predicting performance gains in large-scale systems, including 100-mode and 216-mode configurations. A detailed step-by-step algorithm for implementing the UA protocol is also provided, offering a practical road map for advancing near-term quantum technologies.

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http://hdl.handle.net/10453/193630