ABSTRACT
I. INTRODUCTION According to the fluctuation-dissipation theorem [1], the electrical polar izability of polyelectrolytes is related to the fluctuations of the dipole mo ment generated in the counterion atmosphere around the polyions in the absence of an applied electric field [2-4]. Here we calculate the fluctuations by computer simulation to determine anisotropy of the electrical polariza bility Δα of model DNA fragments in salt-free aqueous solutions [5-7]. The Metropolis Monte Carlo (MC) Brownian dynamics method [8-12] is applied to calculate counterion distributions, electric potentials, and fluctuations of counterion polarization.
