I understand that irreversible computing consumes energy because it has to "get rid" of outputs which have been used. With reversible computing that information is not "wasted" because with the outputs we can calculate the inputs again. But what happens after that? Is there a endless loop of back-and-forth calculation input -> output, output -> input? And what happens when we want the gate to calculate the output of some other inputs? Won't it have to discard the previous input/output which leads to the same information/heat dissipation?
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