Uncle_Budy t1_isp2661 wrote
Reply to comment by Vlad_the_Homeowner in TIL Liquid Helium is the perfect element to keep the superconductive magnets in MRI machines cold by Alternative-Leg1095
Is there much quantum computing actually going on? Or is it more, it will need helium WHEN we start quantum computing?
tyler1128 t1_ispxwff wrote
Beyond research, no. Quantum computing still has many hurdles to overcome before it reaches the point where it is useful for practical applications. Current quantum computers need to be as cold as possible because heat causes the quantum state to "break" (decoherence). The lower the temperature, the longer the state can remain entangled, on average. Liquid helium happens to have the lowest known boiling point, and it also does not ever freeze at standard pressure.
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