Journal article : Letter
Extra cost of erasure due to quantum lifetime broadening
- Abstract:
- 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.
- Publication status:
- Published
- Peer review status:
- Peer reviewed
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- Files:
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(Preview, Supplementary materials, pdf, 416.5KB, Terms of use)
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(Preview, Version of record, pdf, 1.4MB, Terms of use)
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- Publisher copy:
- 10.1103/pc2t-ybtz
Authors
+ European Union
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- Funder identifier:
- https://ror.org/019w4f821
- Grant:
- 101080167
- Programme:
- Quantum Flagship project ASPECTS
+ European Research Council
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- Funder identifier:
- https://ror.org/0472cxd90
- Grant:
- 948932
- Programme:
- European Union’s Horizon 2020 research and innovation program
+ Deutsche Forschungsgemeinschaft
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- Funder identifier:
- https://ror.org/018mejw64
- Grant:
- DFG 384846402
+ Foundational Questions Institute
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- Funder identifier:
- https://ror.org/016en1t86
- Grant:
- FQXi-IAF19-01
+ Engineering and Physical Sciences Research Council
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- Funder identifier:
- https://ror.org/0439y7842
- Grant:
- EP/R045577/1
- EP/T518049/1
- Publisher:
- American Physical Society
- Journal:
- Physical Review A More from this journal
- Volume:
- 112
- Issue:
- 1
- Article number:
- l010601
- Publication date:
- 2025-07-10
- Acceptance date:
- 2025-06-06
- DOI:
- EISSN:
-
2469-9934
- ISSN:
-
2469-9926
- Language:
-
English
- Subtype:
-
Letter
- Pubs id:
-
2253611
- Local pid:
-
pubs:2253611
- Deposit date:
-
2025-08-01
- ARK identifier:
Terms of use
- Copyright holder:
- Dunlop et al.
- Copyright date:
- 2025
- Rights statement:
- © The Author(s) 2025. Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI.
- Licence:
- CC Attribution (CC BY)
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