Coulomb drag between one-dimensional conductors

We have analyzed Coulomb drag between currents of interacting electrons in two parallel one-dimensional conductors of finite length L attached to exte rnal reservoirs. For strong coupling, the relative fluctuations of electron density in the conductors acquire energy gap M. At energies larger than Ga mma = const X nu- exp(-LM/nu-)/L + Gamma (+), where Gamma (+) is the impuri ty scattering rate, and, for L > nu-/M, where nu- is the fluctuation veloci ty, the gap leads to an "ideal" drag with almost equal currents in the cond uctors. At low energies the drag is suppressed by coherent instanton tunnel ing, and the zero-temperature transconductance vanishes, indicating the Fer mi-liquid behavior.