As I understand it (not an expert) superconducting qubits are strongly impacted by temperature. So they're typically operated at sub-Kelvin temperatures, using

As I understand it (not an expert) superconducting qubits are strongly impacted by temperature. So they're typically operated at sub-Kelvin temperatures, using liquid helium. Worse yet, they need unobtanium: helium 3. https://en.m.wikipedia.org/wiki/Dilution_refrigerator https://en.m.wikipedia.org/wiki/Dilution_refrigerator