Zeitschrift für Physik B Condensed Matter

, Volume 91, Issue 4, pp 531–536 | Cite as

Negative excess noise in quantum conductors

  • Gordey B. Lesovik
  • Roland Loosen
Original Contributions


We predict that in quantum conductors the excess noise can be absent or even negative provided the energy dependence of the electron transmission probability at the Fermi energy is sufficiently sharp. In other words the current (or voltage) fluctuations under transport conditions can be less than in equilibrium. As examples for this surprising behavior we consider resonant tunneling, ballistic point contacts and the integer quantum Hall effect.


73.50.Td 74.40.+K 


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Copyright information

© Springer-Verlag 1993

Authors and Affiliations

  • Gordey B. Lesovik
    • 1
  • Roland Loosen
    • 1
  1. 1.Institut für Theoretische PhysikUniversität zu KölnKöln 41Germany

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