TRANSPORT OF 1D INTERACTING ELECTRONS THROUGH BARRIERS AND EFFECTIVE TUNNELING DENSITY-OF-STATES

The transport of an N-channel spinless interacting electron gas throug h an ultrasmall normal tunnel junction coupled to a circuit with Ohmic impedance is studied and the current-voltage characteristics are calc ulated. We give a simple description in terms of an effective density of states of quasi-particles involved in the tunnelling process. This picture also proves useful for cotunnelling of interacting electrons i n multijunction systems.