Authors
Salambô Dago, Ludovic Bellon
Published in
Physical review letters. Volume 137. Issue 14. Pages 147101. Oct 02, 2026.
Abstract
The Landauer principle establishes a fundamental lower bound on the energetic cost of the erasure for a one-bit memory in thermal equilibrium. Here, we experimentally demonstrate how this bound can be shifted by introducing a hysteretic bias h in the feedback-generated virtual potential of a microresonator acting as the information bit. By tuning the hysteresis, we engineer a nonequilibrium steady state with an adjustable effective temperature different from the bath temperature T_{0}, enabling erasure processes that consume over 20% below the Landauer bound k_{B}T_{0}ln2. Unlike sub-Landauer protocols that rely on a deliberately prepared nonequilibrium initial state, the cost reduction observed here is generated during reset by an embedded feedback bias acting as an information engine. The same platform reproduces the standard quasistatic result at h=0 and shifts the asymptotic erasure cost above or below it for h≠0. Our results provide a clean experimental playground for theoretical descriptions based on feedback, information flow, hidden controller states, and generalized nonequilibrium Landauer relations.
PMID:
42886907
Bibliographic data and abstract were imported from PubMed on 17 Oct 2026.
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