We present the results of a detailed study of energy correlations at steady state for a 1-D model of coupled energy and matter transport. Our aim is to discover—via theoretical arguments, conjectures, and numerical simulations—how spatial covariances scale with system size, their relations to local thermodynamic quantities, and the randomizing effects of heat baths. Among our findings are that short-range covariances respond quadratically to local temperature gradients, and long-range covariances decay linearly with macroscopic distance. These findings are consistent with exact results for the simple exclusion and KMP models.
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This research was supported by an NSF Postdoctoral Fellowship.
This research was supported by a grant from the NSF.
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Lin, K.K., Young, LS. Correlations in Nonequilibrium Steady States of Random Halves Models. J Stat Phys 128, 607–639 (2007). https://doi.org/10.1007/s10955-007-9318-9
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DOI: https://doi.org/10.1007/s10955-007-9318-9