I am interested to know if models in quantum mechanics and techniques like superdense coding teleportation are just single cases where they were found to work. Or rather just a prototype of many other examples of similar things.
What I mean is, the Deutsch oracle is just a single algorithm that was found or they found many examples similar to this and it is just a prototype?
Superdense works only if you follow the exact protocol of applying $\Bbb I$, $X$, $Z$, $ZX$? Only two qubits? Or rather it's just an example of many other known things? It seems unreasonable that this is a single example. Aren't there other 3, 4 qubits with same techniques performed by applying other matrices?
Same for teleportation.