Auxiliary particles and Fumi's theorem

Research output: Contribution to journalArticlepeer-review


Fumi's theorem relates the ground state energy to phase shifts and hence the scattering matrix. In turn a theorem associated with the auxiliary particles relates the ground state energy to its self-energy, on shell and implies that the latter can be written in terms of the scattering matrix. These relationships are described along with the role of the infrared divergences.

Original languageEnglish (US)
Pages (from-to)179-180
Number of pages2
JournalPhysica B: Condensed Matter
StatePublished - 1999


  • Auxiliary particles
  • Fumi's theorem
  • Kondo problem

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Electrical and Electronic Engineering


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