Transport in nanoscale systems: the microcanonical versus grand-canonical picture

M. Di Ventra, Tchavdar Todorov

Research output: Contribution to journalArticle

110 Citations (Scopus)


We analyse a picture of transport in which two large but finite charged electrodes discharge across a nanoscale junction. We identify a functional whose minimization, within the space of all bound many-body wavefunctions, defines an instantaneous steady state. We also discuss factors that favour the onset of steady-state conduction in such systems, make a connection with the notion of entropy, and suggest a novel source of steady-state noise. Finally, we prove that the true many-body total current in this closed system is given exactly by the one-electron total current, obtained from time-dependent density-functional theory.
Original languageEnglish
Pages (from-to)8025-8034
Number of pages10
JournalJournal of Physics: Condensed Matter
Issue number45
Publication statusPublished - 17 Nov 2004

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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