Abstract
The solution of the Schrodinger equation is examined for the one-dimensional potential that is formed of a symmetrical double delta barrier with a rectangular well in between. The eigenfunctions and the eigenvalue conditions are obtained for the bound-state solutions. There is a possibility for a particle with infinitesimally small negative energy to be localized in the well. The transmission coefficient and the resonant tunnelling condition are derived from the unbound-state solutions. The well is shown to influence the transmission through the double delta barrier substantially. The conditions are determined under which a particle with infinitesimally small positive energy will tunnel resonantly through the double delta barrier. Moreover, the connection between the resonant tunnelling states and the bound states is discussed.
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