PHOTOINDUCED TUNNELING OF A LUTTINGER LIQUID

The current-voltage characteristic of a tunnel barrier in a Luttinger liquid with interaction parameter g and subject to a time dependent dr iving voltage of frequency Omega is calculated. The DC-conductance of the nonlinearly driven barrier is given by a superposition of the line ar AC-conductances at multiples of Omega, both for strong and weak tun neling. For g = 1/2, we calculate the tunneling conductance for arbitr ary strength of the barrier. For low T and weak repulsive interaction, the conductance shows characteristic oscillations as a function of Om ega. They are signature of photoinduced charge density wave depinning.