Entropy & Maxwell's Demon

Gas partition with demon · Landauer's principle: erasing memory costs kT ln2
Left ⟨v²⟩:
—
Right ⟨v²⟩:
—
Entropy S:
—
Demon bits erased:
0
Landauer cost:
0 kT
Demon state:
watching
Maxwell's Demon (1871): sorts fast/slow particles → lowers entropy without work. Resolution (Landauer 1961): demon must erase memory bits → kT ln2 per bit of heat dissipated.