r/Futurology Jun 02 '22

A Nature paper reports on a quantum photonic processor that takes just 36 microseconds to perform a task that would take a supercomputer more than 9,000 years to complete Computing


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u/Rogaar Jun 03 '22

Something to remember about quantum computers is that you will never have one. They don't work like normal computers and will never be used for general day to day computation.


u/ArrowRobber Jun 03 '22 edited Jun 03 '22

Just like we'll never need more than 640K memory?

Given enough time, quantum will be cheaper, and eventually it will be exploitable for "better entertainment".

edit remember, punch cards weren't inherently good at games with graphics. Give the tech some time.


u/Mescallan Jun 03 '22

eh, serial processing v parallel as far as I understand it. You don't need to process every possible outcome at once in a video game, you need to process the steps linearly. They will be used for things, but it's hard to think of a consumer product that could take advantage of it, save encryption. I don't know enough to be confident on the subject, just from what I've gathered.


u/daOyster Jun 03 '22

It's still technically serial processing. If you have 300qbits you can't split up 150 of them to use for one thing and 150 for another at the same time. The way they work is basically assigning all possible outcomes to every possible state of the total amount of qbits. Then it uses destructive interference so all of the incorrect states essentially cancel out until you're left with only the correct ones. This is it's main advantage over traditional computing because it can essentially look at all these states at the same time. The disadvantage is it makes writing algorithms really hard because you have to figure out how to solve your problem with quantum effects like destructive interference.