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[return to "Ask HN: What scientific phenomenon do you wish someone would explain better?"]
1. arkanc+ps[view] [source] 2020-04-26 22:55:07
>>qqqqqu+(OP)
Quantum Computers. Not like I'm five, but like I'm a software engineer who has a pretty decent understanding of how a classical turing machine works. I can't tell you how many times I've heard someone say "qubits are like bits except they don't have to be just 1 or 0" without providing any coherent explanation of how that's useful. I've also heard that they can try every possible solution to a problem. What I don't understand is how a programmer is supposed to determine the correct solution when their computer is out in some crazy multiverse. I guess what I want is some pseudo code for quantum software.
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2. elgfar+gu[view] [source] 2020-04-26 23:10:50
>>arkanc+ps
I recommend Computerphile's videos https://www.youtube.com/playlist?list=PLzg3FkRs7fcRJLgCmpy3o....

I had the same "problem" as you. What finally made me feel I sort of cracked it was those videos. The way I think of it now is: They let you do matrix multiplication. The internal state of the computer is the matrix, and the input is a vector, where each element is represented by a qubit. The elements can have any value 0 to 1, but in the output vector of the multiplication, they are collapsed into 0 or 1. You then run it many times to get statistical data on the output to be able to pinpoint the output values more closely.

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3. ad404b+Tx[view] [source] 2020-04-26 23:45:34
>>elgfar+gu
I don't know if it's accurate (because I never understand anything I read about it) but this is the most concise and clear explanation I've read on this subject to date. Thank you!
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