3 ms·
Still find it nuts you need to operate the system at 0 kelvin. I assume if we had super efficient cooling equipment (not LN2) we could also do superconductors o
by amrb 4y ago
Still find it nuts you need to operate the system at 0 kelvin. I assume if we had super efficient cooling equipment (not LN2) we could also do superconductors on a small scale?
- ta988 4y agoLN2 is not enough you need LHe for most superconductors. It is usually cooled by LHe that is itself shieled by LN2 to limit losses. LN2 is relatively cheap not LHe. That's why there are recylcing systems to recover the boiling off He in MRIs, NMRs and other supraconducting systems. There are systems that allow cooling without wasting LHe/LN2 but they are pretty limited in size or costly: https://hexus.net/tech/news/cooling/131414-worlds-first-absolute-zero-magnetic-cooler-developed/ https://hexus.net/tech/news/cooling/131414-worlds-first-abso... https://www.wired.co.uk/article/mri-magnet-cooling https://www.wired.co.uk/article/mri-magnet-cooling https://en.wikipedia.org/wiki/Dilution_refrigerator https://en.wikipedia.org/wiki/Dilution_refrigerator edit: s/LH2/LHe
- carterschonwald 4y agoLiquid He right? Liquid hydrogen is relatively cheap
- ta988 4y agoThanks will edit
- packetlost 4y agoYou use lasers to optically trap and cool the atoms, you can get them insanely cold very reliably with methods like this: https://en.wikipedia.org/wiki/Optical_molasses https://en.wikipedia.org/wiki/Optical_molasses https://en.wikipedia.org/wiki/Polarization_gradient_cooling https://en.wikipedia.org/wiki/Polarization_gradient_cooling https://en.wikipedia.org/wiki/Doppler_cooling https://en.wikipedia.org/wiki/Doppler_cooling The components in a system like this are probably operating at room temperature.
- phonebucket 4y ago> Still find it nuts you need to operate the system at 0 kelvin. I assume if we had super efficient cooling equipment (not LN2) we could also do superconductors on a small scale? Neutral atom quantum computers (the type outlined in the article) work at room temperature. Superconducting qubit based quantum computers do indeed require cooling to these levels, though.