Interference at the tunnel ionization from double-center potential
  The tunnel ionization of an electron bounded by two delta potentials under the influence of a constant electric field is considered. The equations for the electron current density for two different initial states are obtained. The dependence of the emission current on the orientation of the potential with respect to the field direction and the distance between them is studied. Appropriate conditions for observation essential interference effects are defined. 
P. A. Golovinski, A. A. Drobyshev
cond-mat.mes-hall