Improving quantum interference visibility between independent sources by enhancing the purity of correlated photon pairs
Summarize this article with:
Quantum Physics arXiv:2601.05671 (quant-ph) [Submitted on 9 Jan 2026] Title:Improving quantum interference visibility between independent sources by enhancing the purity of correlated photon pairs Authors:Hsin-Pin Lo, Kai Asaoka, Hiroki Takesue View a PDF of the paper titled Improving quantum interference visibility between independent sources by enhancing the purity of correlated photon pairs, by Hsin-Pin Lo and 2 other authors View PDF HTML (experimental) Abstract:High-visibility quantum interference between independent photons is essential for demonstrating multi-photon quantum information processing, and it is closely linked to the spectral purity of correlated photon pairs. In this study, we investigate two approaches to enhance the purity of photon pairs generated from a type-0 PPLN waveguide by systematically varying both the pump bandwidth and the interference-filter bandwidth, and we directly compare their performance under identical experimental conditions. The spectral purity is evaluated from measured joint spectral intensities using Schmidt decomposition. Both methods significantly improve the Hong-Ou-Mandel interference visibility to approximately 80%. However, the former approach also yields a higher three-fold coincidence rate, which is advantageous for our ongoing efforts to increase the state fidelity and generation rate of multi-photon time-bin Greenberger-Horne-Zeilinger (GHZ) states. Comments: Subjects: Quantum Physics (quant-ph) Cite as: arXiv:2601.05671 [quant-ph] (or arXiv:2601.05671v1 [quant-ph] for this version) https://doi.org/10.48550/arXiv.2601.05671 Focus to learn more arXiv-issued DOI via DataCite (pending registration) Related DOI: https://doi.org/10.35848/1347-4065/ae35f7 Focus to learn more DOI(s) linking to related resources Submission history From: Hsin-Pin Lo [view email] [v1] Fri, 9 Jan 2026 09:41:52 UTC (631 KB) Full-text links: Access Paper: View a PDF of the paper titled Improving quantum interference visibility between independent sources by enhancing the purity of correlated photon pairs, by Hsin-Pin Lo and 2 other authorsView PDFHTML (experimental)TeX Source view license Current browse context: quant-ph new | recent | 2026-01 References & Citations INSPIRE HEP NASA ADSGoogle Scholar Semantic Scholar export BibTeX citation Loading... BibTeX formatted citation × loading... Data provided by: Bookmark Bibliographic Tools Bibliographic and Citation Tools Bibliographic Explorer Toggle Bibliographic Explorer (What is the Explorer?) Connected Papers Toggle Connected Papers (What is Connected Papers?) Litmaps Toggle Litmaps (What is Litmaps?) scite.ai Toggle scite Smart Citations (What are Smart Citations?) Code, Data, Media Code, Data and Media Associated with this Article alphaXiv Toggle alphaXiv (What is alphaXiv?) Links to Code Toggle CatalyzeX Code Finder for Papers (What is CatalyzeX?) DagsHub Toggle DagsHub (What is DagsHub?) GotitPub Toggle Gotit.pub (What is GotitPub?) Huggingface Toggle Hugging Face (What is Huggingface?) Links to Code Toggle Papers with Code (What is Papers with Code?) ScienceCast Toggle ScienceCast (What is ScienceCast?) Demos Demos Replicate Toggle Replicate (What is Replicate?) Spaces Toggle Hugging Face Spaces (What is Spaces?) Spaces Toggle TXYZ.AI (What is TXYZ.AI?) Related Papers Recommenders and Search Tools Link to Influence Flower Influence Flower (What are Influence Flowers?) Core recommender toggle CORE Recommender (What is CORE?) Author Venue Institution Topic About arXivLabs arXivLabs: experimental projects with community collaborators arXivLabs is a framework that allows collaborators to develop and share new arXiv features directly on our website. Both individuals and organizations that work with arXivLabs have embraced and accepted our values of openness, community, excellence, and user data privacy. arXiv is committed to these values and only works with partners that adhere to them. Have an idea for a project that will add value for arXiv's community? Learn more about arXivLabs. Which authors of this paper are endorsers? | Disable MathJax (What is MathJax?)