Experimental Verification of the Work Fluctuation-Dissipation Relation for Information-to-Work Conversion

David Barker, Matteo Scandi, Sebastian Lehmann, Claes Thelander, Kimberly A. Dick, Martí Perarnau-Llobet, Ville F. Maisi

Research output: Contribution to journalArticlepeer-review


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 Formula Presented, 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.

Original languageEnglish
Article number040602
JournalPhysical Review Letters
Issue number4
Publication statusPublished - 2022 Jan 28

Subject classification (UKÄ)

  • Condensed Matter Physics


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