KnowraBrownian ratchetLinked fromLinked fromThe 5 pages that link to Brownian ratchet, each with the reason it gives.All 5Related 2Compared with 3Maxwell's demonCompared with: Like the demon, it appears to extract work from equilibrium fluctuations until its own thermal behavior is counted.Perpetual motion machineCompared with: Its apparent one-way motion illustrates why thermal noise cannot power a perpetual-work machine.Microscopic reversibilityCompared with: Its directed transport requires energy input and cannot arise from equilibrium reversibility alone.