Been trying for the longest time, I still don’t understand how quantum computing work. It’s always something-something tries all possible combinations and viola, your answer.
Every quantum algorithm is a unitary operation in a Hilbert space. If you want to understand the theory then you will have to do the actual work of learning about Hilbert spaces and unitary operators.
"""Are Git branches, in fact, "homeomorphic endofunctors mapping submanifolds of a Hilbert space"?"""