Sub-Rayleigh Quantum Imaging

TL;DR

This paper introduces quantum imaging strategies that surpass the classical Rayleigh diffraction limit, achieving super-resolution through N-photon techniques with potential applications in microscopy, telescopy, and lithography.

Contribution

It presents novel N-photon quantum imaging methods that enable resolution beyond the Rayleigh limit, reaching Heisenberg and standard quantum limits with loss-resistant classical light sources.

Findings

Achieves 1/√N resolution enhancement over classical methods.

Attains 1/N resolution enhancement at the Heisenberg limit.

Methods are loss resistant and applicable with classical-state light sources.

Abstract

No imaging apparatus can produce perfect images: spatial resolution is limited by the Rayleigh diffraction bound that is a consequence of the imager's finite spatial extent. We show some N-photon strategies that permit resolution of details that are smaller than this bound, attaining either a 1/sqrt(N) enhancement (standard quantum limit) or a 1/N enhancement (Heisenberg limit) over standard techniques. In the incoherent imaging regime, the methods presented are loss resistant, because they can be implemented with classical-state light sources. Our results may be of importance in many applications: microscopy, telescopy, lithography, metrology, etc.