  Using nonequilibrium Langevin dynamics simulations of an electrolyte with
explicit solvent particles, we investigate the effect of hydrodynamic
interactions on the power spectrum of ionic nanopore currents. At low
frequency, we find a power-law dependence of the power spectral density, with
an exponent depending on the ion density. Surprisingly, however, the exponent
is not affected by the presence of the neutral solvent particles. We conclude
that hydrodynamic interactions do not affect the shape of the power spectrum in
the frequency range studied.
