Superconducting refrigerator cools via tunneling cascade

(Phys.org) —Cooling microscopic objects to temperatures near absolute zero requires unconventional refrigeration technologies. One microscale cooling method is superconducting refrigeration, in which refrigerators extract hot quasiparticles (collective excitations) from non-superconducting metals and transport them to superconducting metals. Superconducting refrigerators can cool microscopic objects down to below 1 K.

from Phys.org: Physics News http://ift.tt/1l5REma

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