This package depends on QuantumDots and AffineRayleighOptimization, which are not registered in the general registry. You may need to manually add them directly by
using Pkg; Pkg.add(url="https://github.com/cvsvensson/QuantumDots.jl"); Pkg.add(url="https://github.com/williamesamuelson/AffineRayleighOptimization.jl")
or by adding the registry
using Pkg; Pkg.Registry.add(RegistrySpec(url = "https://github.com/williamesamuelson/PackageRegistry"))
and add them from there
using Pkg; Pkg.add(QuantumDots); Pkg.add(AffineRayleighOptimization)