Experiments on the Thermodynamics of Information Processing

Nonfiction, Science & Nature, Science, Other Sciences, Weights & Measures, Physics, Thermodynamics
Cover of the book Experiments on the Thermodynamics of Information Processing by Momčilo Gavrilov, Springer International Publishing
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Author: Momčilo Gavrilov ISBN: 9783319636948
Publisher: Springer International Publishing Publication: August 1, 2017
Imprint: Springer Language: English
Author: Momčilo Gavrilov
ISBN: 9783319636948
Publisher: Springer International Publishing
Publication: August 1, 2017
Imprint: Springer
Language: English

This thesis reveals how the feedback trap technique, developed to trap small objects for biophysical measurement, could be adapted for the quantitative study of the thermodynamic properties of small systems. The experiments in this thesis are related to Maxwell’s demon, a hypothetical intelligent, “neat fingered” being that uses information to extract work from heat, apparently creating a perpetual-motion machine.

 The second law of thermodynamics should make that impossible, but how? That question has stymied physicists and provoked debate for a century and a half. The experiments in this thesis confirm a hypothesis proposed by Rolf Landauer over fifty years ago: that Maxwell’s demon would need to erase information, and that erasing information—resetting the measuring device to a standard starting state—requires dissipating as much energy as is gained.

 For his thesis work, the author used a “feedback trap” to study the motion of colloidal particles in “v

irtual potentials” that may be manipulated arbitrarily. The feedback trap confines a freely diffusing particle in liquid by periodically measuring its position and applying an electric field to move it back to the origin.

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This thesis reveals how the feedback trap technique, developed to trap small objects for biophysical measurement, could be adapted for the quantitative study of the thermodynamic properties of small systems. The experiments in this thesis are related to Maxwell’s demon, a hypothetical intelligent, “neat fingered” being that uses information to extract work from heat, apparently creating a perpetual-motion machine.

 The second law of thermodynamics should make that impossible, but how? That question has stymied physicists and provoked debate for a century and a half. The experiments in this thesis confirm a hypothesis proposed by Rolf Landauer over fifty years ago: that Maxwell’s demon would need to erase information, and that erasing information—resetting the measuring device to a standard starting state—requires dissipating as much energy as is gained.

 For his thesis work, the author used a “feedback trap” to study the motion of colloidal particles in “v

irtual potentials” that may be manipulated arbitrarily. The feedback trap confines a freely diffusing particle in liquid by periodically measuring its position and applying an electric field to move it back to the origin.

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