Tunneling into strongly biased Tomonaga-Luttinger liquid

TL;DR

This paper investigates how a strong bias voltage affects the tunneling density of states in a Tomonaga-Luttinger liquid, revealing distinct power law singularities for right- and left-movers and discussing nonequilibrium effects.

Contribution

It provides a theoretical calculation of nonequilibrium tunneling exponents in a biased Tomonaga-Luttinger liquid, highlighting differences from equilibrium behavior.

Findings

Power law singularities observed for right- and left-movers

Deviations of tunneling exponents from equilibrium case

Distinct effects of strong bias on tunneling density of states

Abstract

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. Deviations of the nonequilibrium tunneling exponents from the equilibrium case are discussed.