SO Research Seminar - "Beyond Classical Imaging Using Entangled Photons"

How can entangled photons be used to improve imaging performance beyond classical limits? Using a SPDC photon-pair source the photons that are generated are correlated in many degrees of freedom, including their spatial positions and momentum. Using single-photon-sensitive array detectors measuring the arrival of these photon-pairs can be parallelised thereby enabling imaging to be performed without the need for scanning techniques. By leveraging the spatial correlations between the photon-pairs, enhancements in imaging performance metrics may be realised, enhancements that surpass the limits of classical imaging techniques. Using entangled photon sources improvements in image contrast, image resolution, and background noise rejection have been realised. The achievable enhancements that are available using entangled photons-pairs alongside improving detector technologies will enable the transition of quantum enhanced imaging technologies into real-world applications such as quantum-enhanced microscopes and covert imaging schemes.
In this talk, I will be presenting work conducted at the University of Glasgow in the area of quantum enhanced imaging regarding improvements in achievable image resolution and background noise rejection, and also on imaging with undetected photons. In addition, there will be a discussion on the advantages and disadvantages of different photon-pair source and array detector technologies that are used in the quantum imaging community.