Abstract
Weber–Fechner laws are phenomenological relations describing a logarithmic relation between perception and sensory stimulus in a great variety of organisms. While firmly established, a theoretical argument for those laws in terms of relevant models or from statistical physics is largely missing. We present such a discussion in terms of response theory for nonequilibrium systems, where the induced displacement or current, which stands for the perceived stimulus, crucially depends on the change in time-symmetric reactivities. Stationary nonequilibria may indeed generate extra currents by changing the dynamical activity. The argument finishes by understanding how the extra dynamical activity logarithmically encodes the actual stimulus.
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Communicated by Udo Seifert.
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Maes, C. Statistical Mechanical Foundation of Weber–Fechner Laws. J Stat Phys 182, 49 (2021). https://doi.org/10.1007/s10955-021-02726-0
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DOI: https://doi.org/10.1007/s10955-021-02726-0