Time scales in the dynamics of an interacting quantum dot

Details Time scales in the dynamics of an interacting quantum dot Time scales in the dynamics of an interacting quantum dot

2011-11-17

arxiv.org/abs/1111.4135v2

Phys. Rev. B 85, 075301 (2012)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

Version accpeted in PRB

Scientific paper

We analyze the dynamics of a single-level quantum dot with Coulomb interaction, weakly tunnel coupled to an electronic reservoir, after it has been brought out of equilibrium, e.g. by a step-pulse potential. We investigate the exponential decay towards the equilibrium state, which is governed by three time scales. In addition to the charge and spin relaxation time there is a third time scale which is independent of the level position and the Coulomb interaction. This time scale emerges in the time evolution of physical quantities sensitive to two-particle processes.

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