Experimental Verification of the Work Fluctuation-Dissipation Relation for Information-to-Work Conversion.
Phys Rev Lett
; 128(4): 040602, 2022 Jan 28.
Article
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| ID: mdl-35148140
ABSTRACT
We study experimentally work fluctuations in a Szilard engine that extracts work from information encoded as the occupancy of an electron level in a semiconductor quantum dot. We show that as the average work extracted per bit of information increases toward the Landauer limit k_{B}Tln2, the work fluctuations decrease in accordance with the work fluctuation-dissipation relation. We compare the results to a protocol without measurement and feedback and show that when no information is used, the work output and fluctuations vanish simultaneously, contrasting the information-to-energy conversion case where increasing amount of work is produced with decreasing fluctuations. Our study highlights the importance of fluctuations in the design of information-to-work conversion processes.
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Phys Rev Lett
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2022
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