Quantum Hardware: for Foundational Physics and Engineering Prototyping

We discuss the motivation, background, technical implementation, and essential findings of two large quantum hardware experiments: a photon-based "Loophole-free" test of Bell's Inequality, and a quantum computer prototype. We review the respective experimental setups, and some of the hardware developments that enabled each experiment. A comparison reveals some significant differences between the experiments, but we also observe similarities, including roots in quantum foundations and reliance on systems engineering.