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arXiv · 2109.03090

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
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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 towards the Landauer limit $k_BT \ln 2$, 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 work highlights the importance of fluctuations in the design of information-to-work conversion processes.

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David Barker, Matteo Scandi, Sebastian Lehmann, Claes Thelander, Kimberly A. Dick, Martí Perarnau-Llobet, Ville F. Maisi. 2021-09-07. Experimental verification of the work fluctuation-dissipation relation for information-to-work conversion. https://doi.org/10.1103/physrevlett.128.040602

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