Quantum Super-resolution
نویسنده
چکیده
One can locate incoherent sources of light even when they are very close together within an error bound. This thesis contributes to knowledge by presenting progress towards experimentally realising the super-resolution of two incoherent point sources of light, using Fisher information gleaned through image-inversion interferometry measurements. The diffraction limit has been a limiting construct in optical physics for centuries without it being a fundamental physical law. This study is important because it highlights what rich knowledge is within reach while still working with optical wavelengths. Techniques in fluorescence microscopy previously bounded by Rayleigh’s criterion can be enhanced using interferometry, enabling the non-destructive study of smaller and smaller biological samples. At the other end of the length scale, astrophysical applications include resolving binary star systems and discovering exoplanets. What is common in all these cases is that localisation is possible using quantum estimation theory even if the point spread function for each incoherent source is unable to be obtained. Here we tackle a experimental super-resolution technique, superlocalisation by image inversion interferometry, alongside advances in construction of optical devices that can act as light sources with sub-Rayleigh separations. Beyond the successful operation of an image-inversion interferometer, future work in this sphere may add in a directional element to this separation through interferometry in multiple dimensions.
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