Symmetry-Induced Tunnelling in One-Dimensional Disordered Potentials

Details Symmetry-Induced Tunnelling in One-Dimensional Disordered Potentials Symmetry-Induced Tunnelling in One-Dimensional Disordered Potentials

2007-09-25

arxiv.org/abs/0709.3865v1

Physics

Condensed Matter

Disordered Systems and Neural Networks

10 pages, 4 figures

Scientific paper

10.1103/PhysRevB.78.035118

A new mechanism of tunnelling at macroscopic distances is proposed for a wave packet localized in one-dimensional disordered potential with mirror symmetry, V(-x)=V(x). Unlike quantum tunnelling through a regular potential barrier, which occurs only at the energies lower then the barrier height, the proposed mechanism of tunnelling exists even for weak white-noise-like scattering potentials. It also exists in classical circuits of resonant contours with random resonant frequencies. The latter property may be used as a new method of secure communication, which does not require coding and decoding of the transmitting signal.

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