Article Dans Une Revue Physical Review Letters Année : 2012

Transport Inefficiency in Branched-Out Mesoscopic Networks: An Analog of the Braess Paradox

Serge Huant
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Résumé

We present evidence for a counterintuitive behavior of semiconductor mesoscopic networks that is the analog of the Braess paradox encountered in classical networks. A numerical simulation of quantum transport in a two-branch mesoscopic network reveals that adding a third branch can paradoxically induce transport inefficiency that manifests itself in a sizable conductance drop of the network. A scanning-probe experiment using a biased tip to modulate the transmission of one branch in the network reveals the occurrence of this paradox by mapping the conductance variation as a function of the tip voltage and position.

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hal-00709528 , version 1 (12-07-2022)

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M. G. Pala, S. Baltazar, Peng Liu, Hermann Sellier, B. Hackens, et al.. Transport Inefficiency in Branched-Out Mesoscopic Networks: An Analog of the Braess Paradox. Physical Review Letters, 2012, 108, pp.076802. ⟨10.1103/PHYSREVLETT.108.076802⟩. ⟨hal-00709528⟩
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