Ultra-fast single-photon detectors with high current density and operating temperature can
benefit space and ground applications, including quantum optical communication systems …

Single-photon detectors based on superconducting thin films have become a viable class of
technologies for widespread usage in quantum optics. In this tutorial paper we introduce the …

The stellar hierarchy of quantum states of light classifies the states according to the Fock-
state resources that are required for their generation together with unitary Gaussian …

Estimating transmission or loss is at the heart of spectroscopy. To achieve the ultimate
quantum resolution limit, one must use probe states with definite photon number and …

Abstract Photon Number Resolving Detectors (PNRDs) are devices capable of measuring
the number of photons present in an incident optical beam, enabling light sources to be …

Superconducting single photon detectors (SSPD or SNSPD) are excellent for detecting
single photons. The principle of their operation is based on a local violation of …

Transmission measurements are essential from fibre optics to spectroscopy. Quantum theory
dictates that the ultimate precision in estimating transmission or loss is achieved using probe …

This thesis investigates multiphoton quantum interference with a particular emphasis on
photonic partial distinguishability stemming from factors such as timelags or polarization …