What I mean is that waste heat is equivalent to decoherence. If you use superconductors to do work, then they are no longer superconducting - that work introduc

What I mean is that waste heat is equivalent to decoherence. If you use superconductors to do work, then they are no longer superconducting - that work introduces resistance. To do otherwise would violate conservation of energy. I'm not sure how to make it more clear, but decoherence happens because some energy / information is transmitted into the environment. That loss of information is why superpositions collapse. Maybe the confusion is what I mean by superconducting - I mean zero resistance circuits. It's not about what it's made of.