[HN Gopher] Electric cooling could shrink quantum computers ___________________________________________________________________ Electric cooling could shrink quantum computers Author : mfiguiere Score : 34 points Date : 2023-09-12 20:03 UTC (2 hours ago) (HTM) web link (spectrum.ieee.org) (TXT) w3m dump (spectrum.ieee.org) | westurner wrote: | How does electric cooling compare to say optoelectronic laser | cooling in terms of cost and efficiency? | | Laser cooling: https://en.wikipedia.org/wiki/Laser_cooling | throw1234651234 wrote: | Is any of this used in practice? I don't see a "(Practical) | Applications" section. | westurner wrote: | QC and Quantum Simulation: | | /? laser cooling quantum simulation https://www.google.com/se | arch?q=Laser+cooling+quantum+simula... | | From https://phys.org/news/2016-04-laser-cool-quantum- | liquid.amp : | | > _In the experiments, the team created a superfluid helium | film on a silicon chip._ | | > _They then used a bright laser beam to draw energy out of | waves on the surface of the superfluid, cooling them._ | | > _In addition to laser cooling, the research team showed | that combining superfluid with microphotonics allows | extremely precise measurements of superfluid waves_ | | Additionally, FWIU there are now inexpensive integrated | lasers from which a laser cooling array could be built to | enclose a QC sim | petsfed wrote: | Based on the wikipedia article, macroscopic laser cooling is | largely used for cooling gases. | | Insofar as I'm aware, laser cooling is always used as the final | stage of gas cooling, on top of more standard methods, because | there are more efficient methods to go from e.g. room | temperature to cryogenic temperatures, and cryogenic to near- | absolute-zero temperatures and so on. The method in the | article, as I understand it, is meant specifically to address | the cooling that's typically done with e.g. liquid nitrogen and | liquid helium, not necessarily what's done below Helium-4's | condensation temperature. The article is definitely too vague | to know if thermionic cooling addresses a Helium-3 stage or | not. | baz00 wrote: | Have they made them useful yet? | trwaw wrote: | [dead] | datameta wrote: | I think what is missing (and I'm stretching my understanding | here) is the right doping mixture and crystal structure to get | a high enough efficiency of emissions from the junctions. ___________________________________________________________________ (page generated 2023-09-12 23:00 UTC)