Coherent coupling of two quantum dots embedded in an Aharonov-Bohm ring
  We define two laterally gated small quantum dots (~ 15 electrons) in an Aharonov-Bohm geometry in which the coupling between the two dots can be broadly changed. For weakly coupled quantum dots we find Aharonov-Bohm oscillations. In an intermediate coupling regime we concentrate on the molecular states of the double dot and extract the magnetic field dependence of the coherent coupling. 
A.W. Holleitner, C.R. Decker, K. Eberl and R.H. Blick