Classical Coulomb systems: Screening and correlations revisited |
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Authors: | B Jancovici |
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Institution: | (1) Laboratoire de Physique Théorique et Hautes Energies, Université de Paris-Sud, 91405 Orsay, France |
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Abstract: | From the laws of macroscopic electrostatics of conductors (in particular, the existence of screening), taken as given, one can deduce universal properties for the thermal fluctuations in a classical Coulomb system at equilibrium. The universality is especially apparent in the long-range correlations of the electrical potentials and fields. The charge fluctuations are derived from the field fluctuations. This is a convenient way to study the surface charge fluctuations on a conductor with boundaries. Explicit results are given for simple geometries. The potentials and the fields have Gaussian fluctuations, except for a short-distance cutoff.laboratory associated with the Centre National de la Recherche Scientifique. |
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Keywords: | Coulomb systems screening fluctuations correlations surface correlations universality |
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