Experimental Verification of the Work Fluctuation-Dissipation Relation for Information-to-Work Conversion
David Barker1, Matteo Scandi2, Sebastian Lehmann1
1NanoLund and Solid State Physics, Lund University, Box 118, 22100 Lund, Sweden.
Physical Review Letters
|February 11, 2022
Summary
This study experimentally demonstrates how work fluctuations in a quantum dot Szilard engine decrease as extracted work approaches the Landauer limit. This highlights the crucial role of fluctuations in information-to-energy conversion processes.
Area of Science:
- Quantum thermodynamics
- Information-to-energy conversion
Background:
- Szilard engines harness information to perform work.
- Fluctuations are critical in understanding thermodynamic processes at the nanoscale.
Purpose of the Study:
- To experimentally investigate work fluctuations in a semiconductor quantum dot Szilard engine.
- To analyze the relationship between extracted work, information, and fluctuations.
Main Methods:
- Experimental realization of a Szilard engine using a semiconductor quantum dot.
- Measurement of work fluctuations during information extraction.
- Comparison with a protocol lacking measurement and feedback.
Main Results:
- Work fluctuations decrease as average extracted work approaches the Landauer limit (k_{B}Tln2).
- Results align with the work fluctuation-dissipation relation.
- Without information, work output and fluctuations vanish, unlike information-driven processes.
Conclusions:
- Fluctuations play a vital role in designing efficient information-to-work conversion systems.
- Experimental validation of theoretical predictions in quantum thermodynamics.
- Demonstration of the interplay between information, work, and fluctuations in nanoscale engines.
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