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We introduce quantum microscopy by coincidence (QMC) featuring balanced pathlengths, which facilitates super-resolution imaging at the Heisenberg limit, drastically boosting speed and contrast-to-noise ratio (CNR) compared to existing wide-field quantum imaging methods. QMC uses correlated photons traversing symmetric paths, behaving like a photon with half the wavelength for twice the resolution. It withstands 155 times stronger stray light than classical signals, promising non-destructive bioimaging. Our approach propels quantum imaging to microscopic scale by imaging cancer cells. Experimental and theoretical results endorse this balanced pathlength configuration as a path to quantum-enhanced coincidence imaging at the Heisenberg limit.
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Xin Tong, Zhe He, Yide Zhang, Lei Li, Lihong V. Wang, "Super-resolution quantum microscopy at the Heisenberg limit," Proc. SPIE PC12912, Quantum Sensing, Imaging, and Precision Metrology II, PC1291226 (13 March 2024); https://doi.org/10.1117/12.3000759