Robust phase sensitivity in Mach-Zehnder interferometer using photon added and subtracted squeezed coherent state
This advances quantum metrology by identifying a non-classical state that enhances phase sensitivity while resisting decoherence, a critical step toward practical high-precision interferometry in noisy environments.
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Quantum Physics arXiv:2607.02984 (quant-ph) [Submitted on 3 Jul 2026] Title:Robust phase sensitivity in Mach-Zehnder interferometer using photon added and subtracted squeezed coherent state Authors:Shivani Singh, Priya Malpani, Anirban Pathak View a PDF of the paper titled Robust phase sensitivity in Mach-Zehnder interferometer using photon added and subtracted squeezed coherent state, by Shivani Singh and 2 other authors View PDF HTML (experimental) Abstract:For the precision-based measurements, Mach-Zehnder interferometry is a widely used technique. There are various ways to enhance the precision of Mach-Zehnder interferometer (MZI), e.g., having a non-classical input state is one of the ways to enhance the precision of the phase estimation performed by MZI. The phase estimation performed by MZI is investigated here by considering that the input states of MZI are different combinations of photon added and subtracted squeezed coherent states (PASCS and PSSCS). Using quantum Fisher information, it is shown that the use of PASCS in both the input modes of MZI, provides the most precise estimate of the unknown phase. This system is also analyzed in two different measurement scenarios -- single intensity detection (SID) and intensity difference detection (IDD). Systematic analysis has established that the intensity measurement might not be an optimal measurement scheme for phase estimation in MZI as phase and intensity correspond to non-commuting observables. The impact of the photon loss on the MZI-based phase estimation setup is also studied and it is found that PASCS is robust against photon loss, when the loss in MZI is low. Comments: Subjects: Quantum Physics (quant-ph) Cite as: arXiv:2607.02984 [quant-ph] (or arXiv:2607.02984v1 [quant-ph] for this version) https://doi.org/10.48550/arXiv.2607.02984 Focus to learn more arXiv-issued DOI via DataCite (pending registration) Submission history From: Shivani Singh [view email] [v1] Fri, 3 Jul 2026 05:44:01 UTC (10,803 KB) Full-text links: Access Paper: View a PDF of the paper titled Robust phase sensitivity in Mach-Zehnder interferometer using photon added and subtracted squeezed coherent state, by Shivani Singh and 2 other authorsView PDFHTML (experimental)TeX Source view license Current browse context: quant-ph new | recent | 2026-07 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?) 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?)