On the energetics of information exchange

Abstract

We consider the thermodynamic properties of systems in contact with an information source and focus on the consequences of energetic cost associated with the exchange of information. To this end we introduce the model of a thermal tape and derive a general bound for the efficiency of work extraction for systems in contact with such a tape. Depending on the perspective, the correlations between system and tape may either increase or reduce the efficiency of the device. We illustrate our general results with two exactly solvable models, one being an autonomous system, the other one involving measurement and feedback. We also define an ideal tape limit in which our findings reduce to known results.

6 pages, 6 figures

References in corpus (5)

• Work and information processing in a solvable model of Maxwell's demon
• Extracting work from a single heat bath through feedback
• Thermodynamics of feedback controlled systems
• Stochastic thermodynamics for "Maxwell demon" feedbacks
• Efficiency of a Brownian information machine

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• Identifying Functional Thermodynamics in Autonomous Maxwellian Ratchets
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• The Second Laws for an Information driven Current through a Spin Valve
• Transient Dissipation and Structural Costs of Physical Information Transduction
• Functional Thermodynamics of Maxwellian Ratchets: Constructing and Deconstructing Patterns, Randomizing and Derandomizing Behaviors
• A multipurpose information engine that can go beyond the Carnot limit
• From a feedback-controlled demon to an information ratchet in a double quantum dot
• Relations Between Work and Entropy Production for General Information-Driven, Finite-State Engines
• Thermodynamics of Encoding and Encoders
• Information ratchets exploiting spatially structured information reservoirs
• The remote Maxwell demon as energy down-converter
• Incompatible observables in classical physics: A closer look at measurement in Hamiltonian mechanics