The Fano Effect in Aharonov Bohm Interferometers

After briefly reviewing the Fano effect, we explain why it may be relevant to various types of Aharonov Bohm interferometers. We discuss both closed (electron conserving) and open interferometers, in which one path contains either a simple quantum dot or a decorated quantum dot (with more than one internal state or a parallel path. The possible relevance to some hitherto unexplained experimental features is also discussed.