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Symmetry breaking and restoring wave transmission in diode-antidiode double chains

Stefano Lepri1,* and Boris A. Malomed2

  • 1Consiglio Nazionale delle Ricerche, Istituto dei Sistemi Complessi, via Madonna del Piano 10, I-50019 Sesto Fiorentino, Italy
  • 2Department of Physical Electronics, School of Electrical Engineering, Faculty of Engineering, Tel Aviv University, Tel Aviv 69978, Israel

  • *stefano.lepri@isc.cnr.it
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Phys. Rev. E 87, 042903 – Published 4 April, 2013

DOI: https://doi.org/10.1103/PhysRevE.87.042903

Abstract

We introduce a system of two parallel-coupled discrete nonlinear Schrödinger inhomogeneous chains. Each one favors the unidirectional transmission of incident packets, in the opposite directions with respect to each other. Two different configurations of the diode-antidiode pair are considered, i.e., a ladder and a plaquette. They feature, respectively, the uniform transverse linear coupling or the coupling limited to the central nonlinear segment of the system. In the case of weak linear coupling, the symmetry breaking is observed (i.e., the pair still features the diode behavior), while the moderately strong coupling restores the symmetry, making the transmission effectively bidirectional. In the case of the ladder, an oscillatory dependence of the transmission on the strength of the coupling is observed and qualitatively explained.

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Phys. Rev. E 87, 042903– Published 4 April, 2013
  • Received 8 February 2013

©2013 American Physical Society

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