They have very different applications. Laser cooling has extremely low cooling power but can reach low temperatures. It’s good for cooling a gas of atoms or even individually trapped atoms.
A dilution refrigerator, as are used in superconducting quantum computing and other low temperature condensed matter experiments, could cool a sandwich. We’re talking maybe a milliwatt of cooling power. Electronic cooling — I don’t know.
A dilution refrigerator, as are used in superconducting quantum computing and other low temperature condensed matter experiments, could cool a sandwich. We’re talking maybe a milliwatt of cooling power. Electronic cooling — I don’t know.