Shot noise enhancement from non-equilibrium plasmons in Luttinger liquid junctions

Jaeuk U. Kim, Jari M. Kinaret, Mahn Soo Choi

Research output: Contribution to journalArticlepeer-review

10 Citations (Scopus)


We consider a quantum wire double junction system with each wire segment described by a spinless Luttinger model, and study theoretically shot noise in this system in the sequential tunnelling regime. We find that the non-equilibrium plasmonic excitations in the central wire segment give rise to qualitatively different behaviour compared to the case with equilibrium plasmons. In particular, shot noise is greatly enhanced by them, and exceeds the Poisson limit. We show that the enhancement can be explained by the emergence of several current-carrying processes, and that the effect disappears if the channels effectively collapse to one because of fast plasmon relaxation processes, for example.

Original languageEnglish
Pages (from-to)3815-3822
Number of pages8
JournalJournal of Physics Condensed Matter
Issue number25
Publication statusPublished - 2005 Jun 29

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics


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