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Quantum Fluctuations Hinder Finite-Time Information Erasure near the Landauer Limit
Physical Review Letters ( IF 8.385 ) Pub Date : 2020-10-15 , DOI: 10.1103/physrevlett.125.160602
Harry J. D. Miller; Giacomo Guarnieri; Mark T. Mitchison; John Goold

Information is physical but information is also processed in finite time. Where computing protocols are concerned, finite-time processing in the quantum regime can dynamically generate coherence. Here we show that this can have significant thermodynamic implications. We demonstrate that quantum coherence generated in the energy eigenbasis of a system undergoing a finite-time information erasure protocol yields rare events with extreme dissipation. These fluctuations are of purely quantum origin. By studying the full statistics of the dissipated heat in the slow-driving limit, we prove that coherence provides a non-negative contribution to all statistical cumulants. Using the simple and paradigmatic example of single bit erasure, we show that these extreme dissipation events yield distinct, experimentally distinguishable signatures.
更新日期:2020-10-15

 

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