Super-resolving multi-photon interferences with independent light sources
Steffen Oppel, Thomas B\"uttner, Pieter Kok, Joachim von Zanthier
TL;DR
This paper demonstrates that multi-photon interference from independent thermal light sources, combined with linear detection, can enhance imaging resolution without complex quantum state preparation, extending classical correlation experiments.
Contribution
It introduces a method to improve spatial resolution using independent light sources and linear detection, avoiding quantum state preparation.
Findings
Resolution improved with up to five sources
Experimental validation confirms theoretical predictions
No quantum state preparation needed
Abstract
We propose to use multi-photon interferences from statistically independent light sources in combination with linear optical detection techniques to enhance the resolution in imaging. Experimental results with up to five independent thermal light sources confirm this approach to improve the spatial resolution. Since no involved quantum state preparation or detection is required the experiment can be considered an extension of the Hanbury Brown and Twiss experiment for spatial intensity correlations of order N>2.
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