arXiv:0803.2971 · Physical Review Letters
Transport in a Dissipative Luttinger Liquid
Zoran Ristivojević, Thomas Nattermann
Abstract
We study theoretically the transport through a single impurity in a one-channel Luttinger liquid coupled to a dissipative (Ohmic) bath. For nonzero dissipation, the single impurity is always a relevant perturbation which suppresses transport strongly. At zero temperature, the current voltage relation of the link is $I\ensuremath{\sim}\mathrm{exp}(\ensuremath{-}{E}_{0}/eV)$, where ${E}_{0}\ensuremath{\sim}\ensuremath{\eta}/\ensuremath{\kappa}$ and $\ensuremath{\kappa}$ denotes the compressibility. At nonzero temperature $T$, the linear conductance is proportional to $\mathrm{exp}(\ensuremath{-}\sqrt{\mathcal{C}{E}_{0}/{k}_{B}T})$. The decay of Friedel oscillation saturates for a distance larger than ${L}_{\ensuremath{\eta}}\ensuremath{\sim}1/\ensuremath{\eta}$ from the impurity.