---
res:
  bibo_abstract:
  - We present an abstract Dyson expansion for perturbations that are merely relatively
    form-bounded, and apply it to the polaron problem. For a large class of polaron-type
    models, including the Fröhlich and Nelson models, we prove that the vacuum expectation
    value of the heat semi-group is a completely monotone function of the square of
    the total momentum. Consequently, the ground-state energy is a concave function
    of the square of the momentum, a result recently proved for the Fröhlich model
    in [14] using a probabilistic approach via Wiener integrals.@eng
  bibo_authorlist:
  - foaf_Person:
      foaf_givenName: Davide
      foaf_name: Desio, Davide
      foaf_surname: Desio
      foaf_workInfoHomepage: http://www.librecat.org/personId=ea10a57b-23f6-11ef-9085-80d8596d52ef
    orcid: 0000-0001-9840-3809
  - 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: 10.1007/s11005-026-02107-2
  bibo_issue: '4'
  bibo_volume: 116
  dct_date: 2026^xs_gYear
  dct_isPartOf:
  - http://id.crossref.org/issn/1573-0530
  dct_language: eng
  dct_publisher: Springer Nature@
  dct_title: Dyson expansion for form-bounded perturbations and applications to the
    polaron problem@
...