Non-Markovian signatures in the current noise of a charge qubit

We investigate the current noise of a charge qubit coupled to a phonon bath in different parameter regimes. We find, using the theory of Full Counting Statistics of non-Markovian systems, that the current fluctuations are strongly influenced by memory effects generated from the interplay between quantum coherence and the dynamics of the phonon bath. (C) 2007 Elsevier B.V. All rights reserved.