Power generator driven by Maxwell’s demon

Kensaku Chida (), Samarth Desai, Katsuhiko Nishiguchi and Akira Fujiwara
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Kensaku Chida: NTT Basic Research Laboratories, NTT Corporation
Samarth Desai: NTT Basic Research Laboratories, NTT Corporation
Katsuhiko Nishiguchi: NTT Basic Research Laboratories, NTT Corporation
Akira Fujiwara: NTT Basic Research Laboratories, NTT Corporation

Nature Communications, 2017, vol. 8, issue 1, 1-7

Abstract: Abstract Maxwell’s demon is an imaginary entity that reduces the entropy of a system and generates free energy in the system. About 150 years after its proposal, theoretical studies explained the physical validity of Maxwell’s demon in the context of information thermodynamics, and there have been successful experimental demonstrations of energy generation by the demon. The demon’s next task is to convert the generated free energy to work that acts on the surroundings. Here, we demonstrate that Maxwell’s demon can generate and output electric current and power with individual randomly moving electrons in small transistors. Real-time monitoring of electron motion shows that two transistors functioning as gates that control an electron’s trajectory so that an electron moves directionally. A numerical calculation reveals that power generation is increased by miniaturizing the room in which the electrons are partitioned. These results suggest that evolving transistor-miniaturization technology can increase the demon’s power output.

Date: 2017
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DOI: 10.1038/ncomms15301

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