2025/05/07 by Tianzi Wang, Wang, Tianzi, Qian Cao +5
Physics and Astronomy · #Beat (acoustics) #Diffraction #Frequency spectrum #Laser-Matter Interactions and Applications #Limit (mathematics) #Quantum #Quantum limit #Quantum optics and atomic interactions #Quantum state #Quantum system #Resolution (logic) #Spectroscopy and Quantum Chemical Studies #Spectrum (functional analysis) #Thermal
paper · pdf · doi:10.1038/s41598-026-43627-0
published in Scientific Reports 16(1) (Nature Portfolio)
openalex publication_date 2026/03/11 · openalex created_date 2026/03/13 · openalex updated_date 2026/05/06
Optical super-resolution has been widely employed to beat the spatial diffraction limit, which is often stated by Abbe-Rayleigh criterion. Analogously, we propose a frequency super-resolution method, which beats conventional frequency spectral resolution limit often approximated by the full width at half maximum of the spectral peak, Γ. This method utilizes recently developed quantum environment engineering technique. With numerical simulations and experiments, we demonstrate, as a proof-of-concept, the frequency super-resolution method in a three-nuclear-spin system (Trifluoroiodoethylene) by successfully decomposing a thermal state spectrum of the spin [Formula: see text] into four peaks of engineered pseudo-pure states of the quantum environment. The ultimate frequency resolution reaches [Formula: see text]. This method is potentially useful in spectral decomposition of weakly coupled small-size nuclear spin systems.