Extra cost of erasure due to quantum lifetime broadening
Artikel i vetenskaplig tidskrift, 2025
The energy cost of erasing a bit of information was fundamentally lower bounded by Landauer, in terms of the temperature of its environment, W kBT ln 2. Energy consumption and heat generation in computers is now a pressing issue, but real electronic devices operate out of equilibrium and are subject to other noise sources besides temperature. Considering a quantum dot charge bit as a concrete model, we here derive a tighter bound, rigorously quantifying the dissipative impact of lifetime broadening and potential difference, in terms of a few experimentally measurable parameters. In practical contexts, these additional contributions may significantly outweigh the cost due to temperature alone. The results shed light not only on theoretical limits of erasure but also on constraints in realistic devices.
Författare
Joe Dunlop
University of Exeter
Federico Cerisola
University of Exeter
Juliette Monsel
Chalmers, Mikroteknologi och nanovetenskap, Tillämpad kvantfysik
Sofia Sevitz
Universität Potsdam
Jorge Tabanera-Bravo
Max-Planck-Gesellschaft
Jonathan Dexter
University of Oxford
Federico Fedele
University of Oxford
Natalia Ares
University of Oxford
Janet Anders
Universität Potsdam
University of Exeter
PHYSICAL REVIEW A
2469-9926 (ISSN) 2469-9934 (eISSN)
Vol. 112 1 L010601ASPECTS Quantum Thermodynamics of Precision in Electronic Devices
Europeiska kommissionen (EU) (101080167), 2022-11-01 -- 2025-10-31.
Ämneskategorier (SSIF 2025)
Den kondenserade materiens fysik
DOI
10.1103/pc2t-ybtz