---
res:
  bibo_abstract:
  - The angulon, a quasiparticle formed by a quantum rotor dressed by the excitations
    of a many-body bath, can be used to describe an impurity rotating in a fluid or
    solid environment. Here, we propose a coherent state ansatz in the co-rotating
    frame, which provides a comprehensive theoretical description of angulons. We
    reveal the quasiparticle properties, such as energies, quasiparticle weights,
    and spectral functions, and show that our ansatz yields a persistent decrease
    in the impurity’s rotational constant due to many-body dressing, which is consistent
    with experimental observations. From our study, a picture of the angulon emerges
    as an effective spin interacting with a magnetic field that is self-consistently
    generated by the molecule’s rotation. Moreover, we discuss rotational spectroscopy,
    which focuses on the response of rotating molecules to a laser perturbation in
    the linear response regime. Importantly, we take into account initial-state interactions
    that have been neglected in prior studies and reveal their impact on the excitation
    spectrum. To examine the angulon instability regime, we use a single-excitation
    ansatz and obtain results consistent with experiments, in which a broadening of
    spectral lines is observed while phonon wings remain highly suppressed due to
    initial-state interactions.@eng
  bibo_authorlist:
  - foaf_Person:
      foaf_givenName: Zhongda
      foaf_name: Zeng, Zhongda
      foaf_surname: Zeng
  - foaf_Person:
      foaf_givenName: Enderalp
      foaf_name: Yakaboylu, Enderalp
      foaf_surname: Yakaboylu
      foaf_workInfoHomepage: http://www.librecat.org/personId=38CB71F6-F248-11E8-B48F-1D18A9856A87
    orcid: 0000-0001-5973-0874
  - foaf_Person:
      foaf_givenName: Mikhail
      foaf_name: Lemeshko, Mikhail
      foaf_surname: Lemeshko
      foaf_workInfoHomepage: http://www.librecat.org/personId=37CB05FA-F248-11E8-B48F-1D18A9856A87
    orcid: 0000-0002-6990-7802
  - foaf_Person:
      foaf_givenName: Tao
      foaf_name: Shi, Tao
      foaf_surname: Shi
  - foaf_Person:
      foaf_givenName: Richard
      foaf_name: Schmidt, Richard
      foaf_surname: Schmidt
  bibo_doi: 10.1063/5.0135893
  bibo_issue: '13'
  bibo_volume: 158
  dct_date: 2023^xs_gYear
  dct_identifier:
  - UT:000970038800001
  dct_isPartOf:
  - http://id.crossref.org/issn/1089-7690
  dct_language: eng
  dct_publisher: American Institute of Physics@
  dct_title: Variational theory of angulons and their rotational spectroscopy@
  fabio_hasPubmedId: '37031113'
...