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Abstract: We derive an exact formula for the covariance of cartesian distances in twosimple polymer models, the freely-jointed chain and a discrete flexible modelwith nearest-neighbor interaction.
We show that even in the interaction-freecase correlations exist as long as the two distances at least partially sharethe same segments.
For the interacting case, we demonstrate that the naiveexpectation of increasing correlations with increasing interaction strengthonly holds in a finite range of values.
Some suggestions for futuresingle-molecule experiments are made.



Author: Johannes-Geert Hagmann, Karol K.
Kozlowski, Nikos Theodorakopoulos, Michel Peyrard


Source: https://arxiv.org/



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