4 ms·
In my opinion, researchers are not honest when they do explain quantum computers mathematically. I have never seen an explanation with a narrative: - Here are
by JanisErdmanis 4y ago
In my opinion, researchers are not honest when they do explain quantum computers mathematically. I have never seen an explanation with a narrative:
- Here are matrices, this is how we multiply them and get a resulting vector.
- Here are special kinds of matrices SU(N) which leave |\Psi|^2 invariant, and here is an example for multiplying.
- Quantum computers are just SU(N) matrix multiplication accelerators.
At this point, no hype can survive and neither funding.
- ahelwer 4y agoI don't think that's quite true. The product state has exponential size so you'd also need some kind of tensor oracle that could manipulate an exponential quantity of information in linear time.
- JanisErdmanis 4y agoIt's true that the product state is exponential in size. That's why the size of the quadratic matrix SU(N) matrix is N = 2^M, where M is the number of qubits. To my knowledge that's the only thing that is exponential there.
- ahelwer 4y agoHmm, that seems correct then. This is interesting, would you consider extending the explanation and posting it as an answer to this question? https://quantumcomputing.stackexchange.com/q/5459/4153 https://quantumcomputing.stackexchange.com/q/5459/4153
- JanisErdmanis 4y agoThe question of the precision of number representation in SU(N) is an interesting one. It's only a different question :)