Tunneling into strongly biased Tomonaga-Luttinger liquid

We calculate the tunneling density of states for a Tomonaga-Luttinger liquid placed under a strong bias voltage. For the tunneling through a side-coupled point contact, one can observe the power law singularities in the tunneling density of states separately for the right- and left-movers despite the point-like tunnel contact. The calculated nonequilibrium tunneling exponents differ strongly from the equilibrium case. Copyright (c) EPLA, 2008.