Maxwell's demon through the looking glass

Details Maxwell's demon through the looking glass Maxwell's demon through the looking glass

2006-08-10

arxiv.org/abs/physics/0608114v1

ActaPhys.Polon.B38:101-126,2007

Physics

Classical Physics

28 pages, 3 figures, revtex4

Scientific paper

Mechanical Maxwell's demons, such as Smoluchowski's trapdoor and Feynman's ratchet and pawl need external energy source to operate. If you cease to feed a demon the Second Law of thermodynamics will quickly stop its operation. Nevertheless, if the parity is an unbroken symmetry of nature, it may happen that a small modification leads to demons which do not need feeding. Such demons can act like perpetuum mobiles of the second kind: extract heat energy from only one reservoir, use it to do work and be isolated from the rest of ordinary world. Yet the Second Law is not violated because the demons pay their entropy cost in the hidden (mirror) sector of the world by emitting mirror photons.

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