---
res:
  bibo_abstract:
  - "<jats:title>Abstract</jats:title>\r\n                  <jats:p>\r\n                    We
    theoretically compare the quantum Fisher information (QFI) for three configurations
    of absorption spectroscopy with undetected idler photons: an SU(1,1) interferometer
    with inter-source idler loss, an induced-coherence (IC) setup in which the idler
    partially seeds a second squeezer together with a vacuum ancilla, and a distributed-loss
    (DL) scheme with in-medium attenuation. We calculate the QFI as a function of
    parametric gain for both full and signal-only detection access. For losses below
    99% and low to moderate gain, the SU(1,1) configuration provides the largest QFI.
    At high gain and intermediate loss, the IC scheme performs best, while under extreme
    attenuation (transmission\r\n                    <jats:inline-formula>\r\n                      <jats:tex-math>\r\n
    \                       \r\n                      </jats:tex-math>\r\n                      <mml:math
    xmlns:mml=\"http://www.w3.org/1998/Math/MathML\" overflow=\"scroll\">\r\n                        <mml:mrow>\r\n
    \                         <mml:mo>&lt;</mml:mo>\r\n                        </mml:mrow>\r\n
    \                     </mml:math>\r\n                    </jats:inline-formula>\r\n
    \                   1%) the DL model becomes optimal. These results delineate
    the measurement regimes in which each architecture is optimal in terms of information
    theory.\r\n                  </jats:p>@eng"
  bibo_authorlist:
  - foaf_Person:
      foaf_givenName: Martin
      foaf_name: Houde, Martin
      foaf_surname: Houde
  - foaf_Person:
      foaf_givenName: Franz
      foaf_name: Roeder, Franz
      foaf_surname: Roeder
      foaf_workInfoHomepage: http://www.librecat.org/personId=88149
  - foaf_Person:
      foaf_givenName: Christine
      foaf_name: Silberhorn, Christine
      foaf_surname: Silberhorn
      foaf_workInfoHomepage: http://www.librecat.org/personId=26263
  - foaf_Person:
      foaf_givenName: Benjamin
      foaf_name: Brecht, Benjamin
      foaf_surname: Brecht
      foaf_workInfoHomepage: http://www.librecat.org/personId=27150
    orcid: '0000-0003-4140-0556 '
  - foaf_Person:
      foaf_givenName: Nicolás
      foaf_name: Quesada, Nicolás
      foaf_surname: Quesada
  bibo_doi: 10.1088/2515-7647/ae82a2
  bibo_issue: '3'
  bibo_volume: 8
  dct_date: 2026^xs_gYear
  dct_isPartOf:
  - http://id.crossref.org/issn/2515-7647
  dct_language: eng
  dct_publisher: IOP Publishing@
  dct_title: Quantum fisher information analysis for absorption measurements with
    undetected photons@
...