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Title
Speed Limit for a Highly Irreversible Process and Tight Finite-Time Landauer?s Bound
KIAS Author
Park, Hyunggyu,Kwon, Hyukjoon,Lee, Sangyun,Lee, Jae Sung,Lee, Jae Sung,Park, Hyunggyu
Journal
PHYSICAL REVIEW LETTERS, 2022
Archive
arXiv:2204.07388
Abstract
Landauer's bound is the minimum thermodynamic cost for erasing one bit of information. As this bound is achievable only for quasistatic processes, finite-time operation incurs additional energetic costs. We find a tight finite-time Landauer's bound by establishing a general form of the classical speed limit. This tight bound well captures the divergent behavior associated with the additional cost of a highly irreversible process, which scales differently from a nearly irreversible process. We also find an optimal dynamics which saturates the equality of the bound. We demonstrate the validity of this bound via discrete one-bit and coarse-grained bit systems. Our Letter implies that more heat dissipation than expected occurs during high -speed irreversible computation.