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    Transient effects in the backscattered current of a Luttinger liquid

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    We study the backscattered current in a Luttinger liquid in the presence of a point like 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 τR\tau_{R} as function of the electron-electron interaction and the temperature, such that for τR1\tau_{R} 1) the switching process is relevant (irrelevant). Our results suggest the possibility of determining the value of the Luttinger parameter KK through time measurements in transport experiments at fixed voltage.Comment: 8 pages, 3 figures. To appear in Physical Review

    C. Literaturwissenschaft.

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    C. Literaturwissenschaft.

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