Attraction and unbinding of like-charged rods

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Abstract
We investigate the effective interaction between two like-charged rods in the regime of large electrostatic coupling parameters using both Molecular Dynamics simulation techniques and the recently introduced strong-coupling theory. We obtain attraction between the rods for elevated Manning parameters accompanied by an equilibrium surface-to-surface separation of the order of the Gouy-Chapman length. A continuous unbinding between the rods is predicted at a threshold Manning parameter of 2/3.

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