Another Way To Realize Maxwell's Demon

Details Another Way To Realize Maxwell's Demon Another Way To Realize Maxwell's Demon

2005-09-14

arxiv.org/abs/physics/0509111v2

Physics

General Physics

8 pages, 7 figures

Scientific paper

This is another approach to realize Maxwell's "demon" hypothesis. Two Ag-O-Cs thermal electron ejectors, A and B, are settled in a vacuum tube. A non-uniform magnetic field exerted on the tube provides a one-way channel for the thermal electrons. Ejector A, losing electrons, charges positively, while ejector B, getting electrons, charges negatively, resulting in an electric voltage. In flying from A to B, the speed of the electrons decreases, and part of their thermal kinetic energy converts into electric potential energy. Thus, the temperature of the whole electron tube drops down slightly, and that can be compensated by the heat attracted from the ambient air. The device can provide a small but macroscopic power to an external load, violating Kelvin's statement of the second law.

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