I attached a picture, where the energy dissipation (entropy increase) on information erasure is explained. Is the explanation correct?RESTORE TO ONE - is it correct to identify the operation as information erasure? It looks like a negation, not like information erasure.I would say that the erasurement would be performed, when the ball (the black dot near 0 in the picture) would be returned to the meta-stable point between 0 and 1.Maybe the intention of the author was to show, that negation has erasurement embedded in it? Then, he states that computing depends on information erasure - this statement is too strong? - we have reversible computation that do not erase information, correct?The picture and point 2. (above) seem to be a very good metaphore of Landauer's principle. Does it match Landauer's principle closely, or maybe even perfectly - or is it just a picture to help only conceptually understand the principle?(PS. A better title is welcomed..)
Landauer's principle internals - how it works
it.information theory;shannon entropy
You're confused because the example didn't cover all possible cases, and you're extrapolating improperly.Negation is the operation0 → 1,    1 → 0.This is reversible, and can theoretically be performed using an arbitrarily small amount of energy.Restore to one is the operation0 → 1,    1 → 1.This is not reversible, and unavoidably  dissipates $k T \ln 2\;$ energy.