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Quantum, or non-classical, light emission—such as single photons, entangled photons, superradiant, and squeezed light—is of growing interest for emerging quantum technologies. These light sources are immensely valuable for quantum computation, communication, and precision sensing/metrology. In this talk, I will introduce these categories of quantum light and then focus on single-photon and potential superradiant emission from Nitrogen-Vacancy (NV) defect centers in diamond. A central aim is to understand the second-order correlation function () of emission from these centers, as measured via a Hanbury Brown and Twiss (HBT) setup. I will present results demonstrating single-photon emission from NV centers in diamond nanopillars, and discuss how the physical structure affects the canonical antibunching dip in the measurement. I will then address emission that likely arises from a system of coupled NV centers, considering both fluorescence lifetimes and changes to the function. Experimental results and a brief overview of our developed theoretical model will be presented. Finally, I will discuss quantum random number generation using emission from both single and coupled NV centers, comparing their measured differences and providing an explanation based on an entropic model. |