>>4099151I mean, it exists I guess. At least in the limited form of quantum annealing processors, we are still not yet with general purpose quantum computers. But I think google finally claimed quantum supremacy year or two ago. Right now it's way too expensive and underpowered for anything useful. In the future it might pose a danger to significant chunk of our cryptography, but that will take a bit more time. I honestly don't even know what would be the practical use of it. I only read few papers from D-Wave.
