Foundations of Physics Letters

, Volume 16, Issue 1, pp 41-55

First online:

A Modified Szilard Engine: Measurement, Information, and Maxwell's Demon

  • Michael DevereuxAffiliated withLos Alamos Economic Development Corporation

Rent the article at a discount

Rent now

* Final gross prices may vary according to local VAT.

Get Access


Using an isolated measurement process, we calculate the effect measurement has on entropy for the multi-cylinder Szilard engine. We find that the system of cylinders possesses an entropy associated with cylinder total energy states, and that it records information transferred at measurement. Contrary to other's results, we find that the apparatus loses entropy due to measurement. The Second Law of Thermodynamics may be preserved if Maxwell's demon gains entropy moving the engine partition.

engine Maxwell's demon quantum measurement information theory