  Localization property in the disordered few-chain DNA systems with a
long-range correlation is numerically investigated. We apply the chain system
with the correlated disorder in the interchain and/or intrachain hoppings to
the simple model of a double strand of DNA. Numerical results for the density
of states and the Lyapunov exponent of the wave function in the two- or
three-chain models are given. It is found that the correlation effect enhances
the localization length (the inverse least nonnegative Lyapunov exponent)
around the band center.
