2003/11/09 by Georg Seelig, Sebastian Pilgram, Markus Buttiker
Physics and Astronomy · #cond-mat.mes-hall
published as Turk. J. Phys. 27, 331 (2003) · 11 pages, 3 figures. To appear in a special issue on "Quantum Computation at the Atomic Scale" in the Turkish Journal of Physics
arxiv created 2003/11/09 · arxiv updated 2009/12/01
We provide a theoretical explanation for two recent experiments on decoherence of Aharonov-Bohm oscillations in two- and multi-terminal ballistic rings. We consider decoherence due to charge fluctuations and emphasize the role of charge exchange between the system and the reservoir or nearby gates. A time-dependent scattering matrix approach is shown to be a convenient tool for the discussion of decoherence in ballistic conductors.