---
_id: '8587'
abstract:
- lang: eng
  text: Inspired by the possibility to experimentally manipulate and enhance chemical
    reactivity in helium nanodroplets, we investigate the effective interaction and
    the resulting correlations between two diatomic molecules immersed in a bath of
    bosons. By analogy with the bipolaron, we introduce the biangulon quasiparticle
    describing two rotating molecules that align with respect to each other due to
    the effective attractive interaction mediated by the excitations of the bath.
    We study this system in different parameter regimes and apply several theoretical
    approaches to describe its properties. Using a Born–Oppenheimer approximation,
    we investigate the dependence of the effective intermolecular interaction on the
    rotational state of the two molecules. In the strong-coupling regime, a product-state
    ansatz shows that the molecules tend to have a strong alignment in the ground
    state. To investigate the system in the weak-coupling regime, we apply a one-phonon
    excitation variational ansatz, which allows us to access the energy spectrum.
    In comparison to the angulon quasiparticle, the biangulon shows shifted angulon
    instabilities and an additional spectral instability, where resonant angular momentum
    transfer between the molecules and the bath takes place. These features are proposed
    as an experimentally observable signature for the formation of the biangulon quasiparticle.
    Finally, by using products of single angulon and bare impurity wave functions
    as basis states, we introduce a diagonalization scheme that allows us to describe
    the transition from two separated angulons to a biangulon as a function of the
    distance between the two molecules.
acknowledgement: We are grateful to Areg Ghazaryan for valuable discussions. M.L.
  acknowledges support from the Austrian Science Fund (FWF) under Project No. P29902-N27
  and from the European Research Council (ERC) Starting Grant No. 801770 (ANGULON).
  G.B. acknowledges support from the Austrian Science Fund (FWF) under Project No.
  M2461-N27. A.D. acknowledges funding from the European Union’s Horizon 2020 research
  and innovation programme under the European Research Council (ERC) Grant Agreement
  No. 694227 and under the Marie Sklodowska-Curie Grant Agreement No. 836146. R.S.
  was supported by the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation)
  under Germany’s Excellence Strategy – EXC-2111 – 390814868.
article_number: '164302'
article_processing_charge: No
article_type: original
arxiv: 1
author:
- first_name: Xiang
  full_name: Li, Xiang
  id: 4B7E523C-F248-11E8-B48F-1D18A9856A87
  last_name: Li
- first_name: Enderalp
  full_name: Yakaboylu, Enderalp
  id: 38CB71F6-F248-11E8-B48F-1D18A9856A87
  last_name: Yakaboylu
  orcid: 0000-0001-5973-0874
- first_name: Giacomo
  full_name: Bighin, Giacomo
  id: 4CA96FD4-F248-11E8-B48F-1D18A9856A87
  last_name: Bighin
  orcid: 0000-0001-8823-9777
- first_name: Richard
  full_name: Schmidt, Richard
  last_name: Schmidt
- first_name: Mikhail
  full_name: Lemeshko, Mikhail
  id: 37CB05FA-F248-11E8-B48F-1D18A9856A87
  last_name: Lemeshko
  orcid: 0000-0002-6990-7802
- first_name: Andreas
  full_name: Deuchert, Andreas
  id: 4DA65CD0-F248-11E8-B48F-1D18A9856A87
  last_name: Deuchert
  orcid: 0000-0003-3146-6746
citation:
  ama: Li X, Yakaboylu E, Bighin G, Schmidt R, Lemeshko M, Deuchert A. Intermolecular
    forces and correlations mediated by a phonon bath. <i>The Journal of Chemical
    Physics</i>. 2020;152(16). doi:<a href="https://doi.org/10.1063/1.5144759">10.1063/1.5144759</a>
  apa: Li, X., Yakaboylu, E., Bighin, G., Schmidt, R., Lemeshko, M., &#38; Deuchert,
    A. (2020). Intermolecular forces and correlations mediated by a phonon bath. <i>The
    Journal of Chemical Physics</i>. AIP Publishing. <a href="https://doi.org/10.1063/1.5144759">https://doi.org/10.1063/1.5144759</a>
  chicago: Li, Xiang, Enderalp Yakaboylu, Giacomo Bighin, Richard Schmidt, Mikhail
    Lemeshko, and Andreas Deuchert. “Intermolecular Forces and Correlations Mediated
    by a Phonon Bath.” <i>The Journal of Chemical Physics</i>. AIP Publishing, 2020.
    <a href="https://doi.org/10.1063/1.5144759">https://doi.org/10.1063/1.5144759</a>.
  ieee: X. Li, E. Yakaboylu, G. Bighin, R. Schmidt, M. Lemeshko, and A. Deuchert,
    “Intermolecular forces and correlations mediated by a phonon bath,” <i>The Journal
    of Chemical Physics</i>, vol. 152, no. 16. AIP Publishing, 2020.
  ista: Li X, Yakaboylu E, Bighin G, Schmidt R, Lemeshko M, Deuchert A. 2020. Intermolecular
    forces and correlations mediated by a phonon bath. The Journal of Chemical Physics.
    152(16), 164302.
  mla: Li, Xiang, et al. “Intermolecular Forces and Correlations Mediated by a Phonon
    Bath.” <i>The Journal of Chemical Physics</i>, vol. 152, no. 16, 164302, AIP Publishing,
    2020, doi:<a href="https://doi.org/10.1063/1.5144759">10.1063/1.5144759</a>.
  short: X. Li, E. Yakaboylu, G. Bighin, R. Schmidt, M. Lemeshko, A. Deuchert, The
    Journal of Chemical Physics 152 (2020).
corr_author: '1'
date_created: 2020-09-30T10:33:17Z
date_published: 2020-04-27T00:00:00Z
date_updated: 2026-04-08T07:26:09Z
day: '27'
department:
- _id: MiLe
- _id: RoSe
doi: 10.1063/1.5144759
ec_funded: 1
external_id:
  arxiv:
  - '1912.02658'
  isi:
  - '000530448300001'
  pmid:
  - '32357791'
intvolume: '       152'
isi: 1
issue: '16'
keyword:
- Physical and Theoretical Chemistry
- General Physics and Astronomy
language:
- iso: eng
main_file_link:
- open_access: '1'
  url: https://arxiv.org/abs/1912.02658
month: '04'
oa: 1
oa_version: Preprint
pmid: 1
project:
- _id: 26031614-B435-11E9-9278-68D0E5697425
  call_identifier: FWF
  grant_number: P29902
  name: Quantum rotations in the presence of a many-body environment
- _id: 2688CF98-B435-11E9-9278-68D0E5697425
  call_identifier: H2020
  grant_number: '801770'
  name: 'Angulon: physics and applications of a new quasiparticle'
- _id: 26986C82-B435-11E9-9278-68D0E5697425
  call_identifier: FWF
  grant_number: M02641
  name: A path-integral approach to composite impurities
- _id: 25C6DC12-B435-11E9-9278-68D0E5697425
  call_identifier: H2020
  grant_number: '694227'
  name: Analysis of quantum many-body systems
publication: The Journal of Chemical Physics
publication_identifier:
  eissn:
  - 1089-7690
  issn:
  - 0021-9606
publication_status: published
publisher: AIP Publishing
quality_controlled: '1'
related_material:
  record:
  - id: '8958'
    relation: dissertation_contains
    status: public
status: public
title: Intermolecular forces and correlations mediated by a phonon bath
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 152
year: '2020'
...