Fifteen Degrees, Fifteen Million Degrees, One Hundred Gigahertz discussed on Scientific Sense
Between superconductors that were first described and won the nobel prize per brian. Josephson a physicist and end so these Joseph are used. Because one of the things that you need to make accu- bet Just like a transistor or a regular bid is you need. You need to have non year behavior so you need to have some non linear already. And and that's what allows you to go sort of zero or one. St and in the case of a quantum a cubit than this non linear also able to be used and and put into state as well of your zero in one state but but these junctions are have some issues there sometimes tricky to make tricky to to to make reliably and one of the key things today is is trying to make more and more cubans so bigger and bigger arrays of of these cubits that are connected together just like you know is important to make more and more transistors in regular computers and so until google surveys and demonstration by something like fifty three cubits or something like that right. Yeah yeah they have on order. Fifty and ninety m has about the same number. Which isn't that. Many of the computing goes up exponentially with the number. So you don't have to get that many before you're able to compete or do better than a regular computer but but so the there's two things about our design That are that are different so the first thing is that we're not using any junctions instead. What we're using is a superconducting nanna wires so very thin thin wires up superconductor and these have our non linear because because of not not an effect called non linear connecticut which which we Which we've been using or or noticed When we were making our astronomy detectors and because there's no there's no junction. The thought is that they would be less sensitive to a certain type of noise that you have in this In the gap in between the superconductors in this tunnel junction and also the hope would be that they would be easier again. Just like the connecticut detectors easier to fabricate and easier to make large numbers of the other thing. that's different is. it's w band. So w manned is a wave guide. Bandit is centered around ninety gigahertz or one hundred gigahertz The cubans that. Ibm or or google or using They tend to operate in less than ten gigabytes. And so that's that's an important difference because at at ten gigahertz. One of the things that you have to do. If you want your quantum computer to work is you have to make sure that it's not upset by thermal noise so you need to cool everything really cold and you have to cool it for ten gigahertz the temperature you have to cool it to is proportional to the frequency. That you're cuban operates attend gigahertz. they're cooling their these cubans down to sort of fifteen degrees. Fifteen million degrees above absolute zero. Fifteen million kelvin. But if we can make ours work at ninety gigahertz hundred gigahertz then we only would have to cool to maybe. Two hundred million kelvin. Which still sounds pretty cold yet but it turns out that it's a lot easier to cool stuff down and in fact we..