Phase coherent transmission through interacting mesoscopic systems

Details Phase coherent transmission through interacting mesoscopic systems Phase coherent transmission through interacting mesoscopic systems

2000-06-23

arxiv.org/abs/cond-mat/0006361v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

91 pages, 43 figures, to be published in Physics Reports

Scientific paper

10.1016/S0370-1573(00)00084-3

This is a review of the phase coherent transmission through interacting mesoscopic conductors. As a paradigm we study the transmission amplitude and the dephasing rate for electron transport through a quantum dot in the Coulomb blockade regime. We summarize experimental and theoretical work devoted to the phase of the transmission amplitude. It is shown that the evolution of the transmission phase may be dominated by non-universal features in the short-time dynamics of the quantum dot. The controlled dephasing in Coulomb coupled conductors is investigated. Examples comprise a single or multiple quantum dots in close vicinity to a quantum point contact. The current through the quantum point contact "measures" the state of the dots and causes dephasing. The dephasing rate is derived using widely different theoretical approaches. The Coulomb coupling between mesoscopic conductors may prove useful for future work on electron coherence and quantum computing.

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