DYNAMIC CONDUCTIVITY OF INTERACTING ELECTRONS IN OPEN MESOSCOPIC STRUCTURES

It is shown that in one-dimensional mesoscopic structures the electron -electron interaction leads to qualitatively new effects in the dynami c conductivity which are best manifested in the frequency dependence o f the impedance. Interelectronic repulsion increases the resistance an d narrows the resonance dips of the resistance at transit frequencies. Interelectronic attraction gives rise to resonance peaks of the resis tance against a high-conductivity background. These effects are due to the reflection of bosonic excitations of a Luttinger liquid from the boundaries of a quantum channel with current-lead electrodes and to re sonances of these excitations over the length of the channel. (C) 1997 American Institute of Physics.