Coherence Time Resolvable Diffraction and New Tunnelling Electronics

Abstract

With the help of the perturbation method and the Feynman path integraltechnique, we analytically demonstrate that, when the electronic spectrum ofa mesoscopic box is measured through two connecting leads, there existsa class of new diffraction phenomena in the coherence timedomain, based on the new coherent tunnelling model. It is shown that the newdiffraction effect determines the minimal resolvable coherence time tothe Heisenberg limit. In particular, Fraunhofer optical phenomena,such as missing order and grating effects, can be reproduced in themeso-systems. The predicted periodic oscillations as a function ofvoltage are in excellent agreement with experimental observations.