American quantum information theorist Charles Bennett's 1987 rendition of Szilard's demon collecting information on the particles of the system. [3]
In demons, Szilard’s demon is a hypothetical intelligent being noted for his sharp “vision” ability to continuously observe and collect “information” the speeds and positions of the various particles of two chambers of gas molecules separated by a frictionless sliding door. If the collecting powers of the demon are above or beyond the control of the second law the demon will be able to move heat from a cold body to a hot body without the expenditure of work; if conversely the act of collecting information requires energy, then, according to the second law, a loss of available energy will progress, as the entropy of the two systems combined increases as the motions of the total set of particles moves toward equilibrium. [1]
Evolution and heat death In 1946, Belgian-born English thermodynamicist Alfred Ubbelohde seems to have used the Szilard demon model to argue that new findings in quantum physics and aspects of radiation thermodynamics might negate the heat death ultimatum of the universe. [1]
