---
res:
  bibo_abstract:
  - We study translation-invariant quasi-free states for a system of fermions with
    two-particle interactions. The associated energy functional is similar to the
    BCS functional but also includes direct and exchange energies. We show that for
    suitable short-range interactions, these latter terms only lead to a renormalization
    of the chemical potential, with the usual properties of the BCS functional left
    unchanged. Our analysis thus represents a rigorous justification of part of the
    BCS approximation. We give bounds on the critical temperature below which the
    system displays superfluidity.@eng
  bibo_authorlist:
  - foaf_Person:
      foaf_givenName: Gerhard
      foaf_name: Bräunlich, Gerhard
      foaf_surname: Bräunlich
  - foaf_Person:
      foaf_givenName: Christian
      foaf_name: Hainzl, Christian
      foaf_surname: Hainzl
  - foaf_Person:
      foaf_givenName: Robert
      foaf_name: Seiringer, Robert
      foaf_surname: Seiringer
      foaf_workInfoHomepage: http://www.librecat.org/personId=4AFD0470-F248-11E8-B48F-1D18A9856A87
    orcid: 0000-0002-6781-0521
  bibo_doi: 10.1142/S0129055X14500123
  bibo_issue: '7'
  bibo_volume: 26
  dct_date: 2014^xs_gYear
  dct_identifier:
  - UT:000341933500002
  dct_language: eng
  dct_publisher: World Scientific Publishing@
  dct_title: Translation-invariant quasi-free states for fermionic systems and the
    BCS approximation@
...