Characterising transformations between quantum objects, 'completeness' of quantum properties, and transformations without a fixed causal order
Characterising transformations between quantum objects, 'completeness' of quantum properties, and transformations without a fixed causal order
Many fundamental and key objects in quantum mechanics are linear mappings between particular affine/linear spaces. This structure includes basic quantum elements such as states, measurements, channels, instruments, non-signalling channels and channels with memory, and also higher-order operations such as superchannels, quantum combs, n-time processes, testers, and process matrices which may …