Identities and many-body approaches in Bose-Einstein condensates

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4 Citations (Scopus)


This paper discusses exact relations in the Bose-Einstein condensates, starting from basic properties of an ideal Bose gas. In particular, focused on are the Hugenholtz-Pines relation, Nepomnyashchii-Nepomnyashchii identity, and identities for the density response function. After introducing these exact relations, a few approaches of many-body approximations are discussed, which satisfy the exact relations in the Bose-Einstein condensates. This paper will serve as a bridge between theories on exact relations and those on approximations in the Bose-Einstein condensates.

Original languageEnglish
Pages (from-to)1222-1230
Number of pages9
JournalActa Physica Polonica A
Issue number6
Publication statusPublished - 2019
Externally publishedYes

ASJC Scopus subject areas

  • General Physics and Astronomy


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