Abstract
Recently, oscillations have been observed in the conductance of double-point contact devices. They are explained microscopically in the experimentally relevant limit of a slowly varying potential and high magnetic field using a WKB-type approximation. The condition for resonant transmission is given; in the limit of low transmittancy of the single barriers, resonant transmission occurs whenever a half-integer number of flux quanta is enclosed in the path of the electron between the two quantum point contacts.
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