2010/02/16 by Mariano J. Salvay, Hugo A. Aita, Hugo Aita +2
Physics and Astronomy · #Cold Atom Physics and Bose-Einstein Condensates #Quantum and electron transport phenomena #Semiconductor Quantum Structures and Devices #cond-mat.mes-hall #cond-mat.str-el
paper · pdf · doi:10.1103/physrevb.81.125406
published as Phys. Rev. B 81, 125406 (2010) · 8 pages, 3 figures. To appear in Physical Review B
arxiv created 2010/02/16 · openalex publication_date 2010/03/05 · arxiv updated 2010/06/07 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
We study the backscattered current in a Luttinger liquid in the presence of a pointlike weak impurity switched on at finite time, taking into account finite-temperature effects. We show how the well-known results for a static impurity are distorted. We derive a dimensionless parameter \ensuremathτR as a function of the electron-electron interaction and the temperature, such that for \ensuremathτR<1 (>1) the switching process is relevant (irrelevant). Our results suggest the possibility of determining the value of the Luttinger parameter K through time measurements in transport experiments at fixed voltage.