Total cost of operating an information engine

Please always quote using this URN: urn:nbn:de:bvb:20-opus-148286
  • We study a two-level system controlled in a discrete feedback loop, modeling both the system and the controller in terms of stochastic Markov processes. We find that the extracted work, which is known to be bounded from above by the mutual information acquired during measurement, has to be compensated by an additional energy supply during the measurement process itself, which is bounded by the same mutual information from below. Our results confirm that the total cost of operating an information engine is in full agreement with the conventionalWe study a two-level system controlled in a discrete feedback loop, modeling both the system and the controller in terms of stochastic Markov processes. We find that the extracted work, which is known to be bounded from above by the mutual information acquired during measurement, has to be compensated by an additional energy supply during the measurement process itself, which is bounded by the same mutual information from below. Our results confirm that the total cost of operating an information engine is in full agreement with the conventional second law of thermodynamics. We also consider the efficiency of the information engine as a function of the cycle time and discuss the operating condition for maximal power generation. Moreover, we find that the entropy production of our information engine is maximal for maximal efficiency, in sharp contrast to conventional reversible heat engines.show moreshow less

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Metadaten
Author: Jaegon Um, Haye Hinrichsen, Chulan Kwon, Hyunggyu Park
URN:urn:nbn:de:bvb:20-opus-148286
Document Type:Journal article
Faculties:Fakultät für Physik und Astronomie / Institut für Theoretische Physik und Astrophysik
Language:English
Parent Title (English):New Journal of Physics
Year of Completion:2015
Volume:17
Issue:085001
Source:New Journal of Physics 17:085001 (2015). DOI: 10.1088/1367-2630/17/8/0850
DOI:https://doi.org/10.1088/1367-2630/17/8/085001
Dewey Decimal Classification:5 Naturwissenschaften und Mathematik / 53 Physik / 530 Physik
Tag:Maxwell demon; Szilárd; efficiency; fluctuation theorem; information engine; maximum power; mutual information; wrath
Release Date:2018/11/13
Licence (German):License LogoCC BY: Creative-Commons-Lizenz: Namensnennung