Experimental demonstration of superresolution of partially coherent light sources using parity sorting

Abstract

Analyses based on quantum metrology have shown that the ability to localize the positions of two incoherent point sources can be significantly enhanced through the use of mode sorting. Here we theoretically and experimentally investigate the effect of partial coherence on the sub-diffraction limit localization of two sources based on parity sorting. With the prior information of a negative and real-valued degree of coherence, higher Fisher information is obtained than that for the incoherent case. Our results pave the way to clarifying the role of coherence in quantum limited metrology.

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• Fundamental Limits on Subwavelength Range Resolution
• Super-resolution of two unbalanced point sources assisted by the entangled partner
• Performance-tradeoff relation for locating two incoherent optical point sources
• Beating the spectroscopic Rayleigh limit via post-processed heterodyne detection
• Optimizing measurement tradeoffs in multiparameter spatial superresolution
• Off-axis Aberrations Improve the Resolution Limits of Incoherent Imaging
• Quantum uncertainty of optical coherence
• Tight information bounds for spontaneous emission lifetime resolution of quantum sources with varied spectral purity
• Quantum-limited superresolution of two arbitrary incoherent point sources: beating the resurgence of Rayleigh's curse
• Superresolving collective quantum measurements