Total cost of operating an information engine
arXiv:1501.03733 · doi:10.1088/1367-2630/17/8/085001
Abstract
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 conventional second law of thermodynamics. We also consider the efficiency of the information engine as 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.
PDFLaTeX, 12 pages, 11 figures
References in corpus (5)
- Second Law of Thermodynamics with Discrete Quantum Feedback Control
- Experimental study of mutual information in a Maxwell Demon
- Thermodynamics of a physical model implementing a Maxwell demon
- Extracting work from a single heat bath through feedback
- Information-theoretic vs. thermodynamic entropy production in autonomous sensory networks
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- Efficiency at maximum power of a Carnot quantum information engine
- Energetic cost of feedback control
- Nonuniversality of heat engine efficiency at maximum power
- Functional Thermodynamics of Maxwellian Ratchets: Constructing and Deconstructing Patterns, Randomizing and Derandomizing Behaviors
- Entropy and Thermodynamic second laws: New perspective - stochastic thermodynamics and fluctuation theorems
- Maxwell's demon and the management of ignorance in stochastic thermodynamics
- Thermodynamics of Encoding and Encoders
- Mutual information change in feedback processes driven by measurement