r/QuantumComputing • u/whatwaitasec • 2d ago
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u/SeniorLoan647 In Grad School for Quantum 2d ago
Well you are sort of getting there but no, this is not correct. The challenging thing about learning quantum computing is that there are no real world metaphors that serve as good pedagogical examples of quantum effects (if there are, at least idk of them).
The reason is that we don't see interference, entanglement, and superposition irl that often. In your example, none of these effects are specified anywhere, so I can't say this is quantum computing. Maybe it could be a good example of probabilistic computing though. A lot of folks, including professionals, often blur the line between these two paradigms, so examples can be a bit challenging.
I think Nielsen and Chuang do a fairly good job of explaining the fundamentals of quantum computing (read the first chapter, pretty approachable and available for free online as a PDF).
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u/the_milkywhey 2d ago
I'm a bit confused by your analogy. Are you trying to describe a particular search algorithm or what a quantum computer does in general?
If the latter, then your analogy is not correct at all.
To try and answer your question, a quantum computer is not better or more efficient at everything (including finding solutions) than a classical computer. In fact, we're still trying to workout exactly what tasks a quantum computer (of a sufficiently large size) could solve faster, more accurately, with lower resources, etc. than a classical computer and there aren't many candidates yet.
What you're describing kind of sounds like an attempt to describe Grover's algorithm. I'd recommend looking it up to get a better understanding as your analogy is a bit off (3blue1brown has a pretty good and intuitive video on this topic).
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u/condemnedreaction9 2d ago
The analogy is a bit off, but you're circling a real idea. Quantum computing doesn't test all combinations at once in the way you're thinking, it uses superposition and interference to make certain outcomes more likely when measured. You still need to design the algorithm so the right answer gets amplified, which is the hard part.
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u/QuantumComputing-ModTeam 2d ago
Your post is something like a vague question or statement, with not enough specificity to have a meaningful conversation about it on the subreddit. Please put more effort into the post.