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Noise and conductance in one-dimensional systems

Il Nuovo Cimento D, ISSN: 0392-6737, Vol: 14, Issue: 5, Page: 509-515
1992
  • 12
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Metrics Details

  • Citations
    12
    • Citation Indexes
      12
  • Captures
    1

Article Description

We derive an explicit form for the current correlation function of a Fermi gas in a finite sample at arbitrary degree of degeneracy. The expression so found enables a continuous investigation from diffusive to ballistic transport regimes to be carried out. For degenerate one-dimensional conductors under ballistic regime we find that the noise spectral density exhibits characteristic geometrical resonances and its low-frequency value has the universal form S (0)=8 e KT/h, implying a universal conductance G=2 e/h. © 1992 Società Italiana di Fisica.

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