Ensemble Equivalence for Counterion Condensation on a Two Dimensional Charged Disc

Details Ensemble Equivalence for Counterion Condensation on a Two Dimensional Charged Disc Ensemble Equivalence for Counterion Condensation on a Two Dimensional Charged Disc

2011-10-17

arxiv.org/abs/1110.3635v1

Physics

Condensed Matter

Statistical Mechanics

4 pages, 2 figures

Scientific paper

We study the counterion condensation on a two dimensional charged disc in the limit of infinite dilution, and compare the energy-temperature relation obtained from the canonical free energy and microcanonical entropy. The microcanonical entropy is piecewise linear in energy, and is shown to be concave for all energies. As a result, even though the interactions are long-ranged, the energy-temperature relation and hence the counterion condensation transition points are identical in both the ensembles.

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