Parameter estimation in the context of quantum metrology seeks to extract the maximum information from a quantum state about a specific parameter. Part of the group activity addresses the challenge of resolving incoherent light sources below the diffraction limit, with the key parameter being the distance between two point sources. By utilizing suitable measurement techniques, such as spatial mode demultiplexing, one can overcome the Rayleigh limit and achieve superresolution, opening up new possibilities for surpassing the resolution constraints of conventional imaging methods.
Selected publications
- C. Rouvière, D. Barral, A. Grateau, I. Karuseichyk, G. Sorelli, M. Walschaers, and N. Treps, “Ultra-sensitive separation estimation of optical sources”Optica 11, 166-170 (2024).
- M. Gessner, N. Treps, and C. Fabre, “Estimation of a parameter encoded in the modal structure of a light beam: a quantum theory,” Optica 10, 996-999 (2023)
- G. Sorelli, M. Gessner, M. Walschaers, N. Treps, “Optimal observables and estimators for practical superresolution imaging” Phys. Rev. Lett. 127, 123604 (2021).
- G. Labroille, B. Denolle, P. Jian, P. Genevaux, N. Treps, and J.-F. Morizur, “Efficient and mode selective spatial mode multiplexer based on multi-plane light conversion,” Opt. Express 22, 15599-15607 (2014)
- N. Treps et al. A Quantum Laser Pointer. Science 301,940-943 (2003).
