Private Remote Phase Estimation over a Lossy Quantum Channel
Year: 2026
Authors: Kianvash F., Barbieri M., Rosati M.
Autors Affiliation: Univ Roma Tre, Dipartimento Ingn Civile Informat & Tecnol Aeronau, Via Vasca Navale 79, I-00146 Rome, Italy; Univ Roma Tre, Dipartimento Sci, Via Vasca Navale 84, I-00146 Rome, Italy; CNR, Ist Nazl Ott, INO, Via Nello Carrara 1, I-50019 Florence, Italy; INFN, Sez Roma Tre, Via Vasca Navale 84, I-00146 Rome, Italy.
Abstract: Private remote quantum sensing aims at estimating a parameter at a distant location by transmitting quantum states on an insecure quantum channel, limiting information leakage and disruption of the estimation itself from an adversary. Previous results highlighted that one can bound the estimation performance in terms of the observed noise. However, if no assumptions are placed on the channel model, such bounds are very loose and severely limit the estimation. We propose and analyze a private remote sensing protocol using-for the first time, to our knowledge-continuous-variable states in the single-user setting. Assuming a typical class of lossy attacks and employing tools from quantum communication, we calculate the true estimation error and privacy of our protocol, both in the asymptotic limit of many channel uses and in the finite-size regime. Our results show that a realistic channel-model assumption, which can be validated with measurement data, allows for a much tighter quantification of the estimation error and privacy for all practical purposes.
Journal/Review: PHYSICAL REVIEW LETTERS
Volume: 136 (6) Pages from: 60805-1 to: 60805-6
More Information: Grant M4-C2-Inv) and MUR Dipartimento di Eccellenza 2023-2027.KeyWords: Communication channels (information theory); Data privacy; Information leakage; Quantum communication; Quantum cryptography; Quantum optics; Remote sensingDOI: 10.1103/rhgw-t21zCitations: 1data from “WEB OF SCIENCE” (of Thomson Reuters) are update at: 2026-03-15References taken from IsiWeb of Knowledge: (subscribers only)
