---
_id: '1813'
abstract:
- lang: eng
  text: We develop a microscopic theory describing a quantum impurity whose rotational
    degree of freedom is coupled to a many-particle bath. We approach the problem
    by introducing the concept of an “angulon”—a quantum rotor dressed by a quantum
    field—and reveal its quasiparticle properties using a combination of variational
    and diagrammatic techniques. Our theory predicts renormalization of the impurity
    rotational structure, such as that observed in experiments with molecules in superfluid
    helium droplets, in terms of a rotational Lamb shift induced by the many-particle
    environment. Furthermore, we discover a rich many-body-induced fine structure,
    emerging in rotational spectra due to a redistribution of angular momentum within
    the quantum many-body system.
article_number: '203001'
article_processing_charge: No
arxiv: 1
author:
- 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
citation:
  ama: Schmidt R, Lemeshko M. Rotation of quantum impurities in the presence of a
    many-body environment. <i>Physical Review Letters</i>. 2015;114(20). doi:<a href="https://doi.org/10.1103/PhysRevLett.114.203001">10.1103/PhysRevLett.114.203001</a>
  apa: Schmidt, R., &#38; Lemeshko, M. (2015). Rotation of quantum impurities in the
    presence of a many-body environment. <i>Physical Review Letters</i>. American
    Physical Society. <a href="https://doi.org/10.1103/PhysRevLett.114.203001">https://doi.org/10.1103/PhysRevLett.114.203001</a>
  chicago: Schmidt, Richard, and Mikhail Lemeshko. “Rotation of Quantum Impurities
    in the Presence of a Many-Body Environment.” <i>Physical Review Letters</i>. American
    Physical Society, 2015. <a href="https://doi.org/10.1103/PhysRevLett.114.203001">https://doi.org/10.1103/PhysRevLett.114.203001</a>.
  ieee: R. Schmidt and M. Lemeshko, “Rotation of quantum impurities in the presence
    of a many-body environment,” <i>Physical Review Letters</i>, vol. 114, no. 20.
    American Physical Society, 2015.
  ista: Schmidt R, Lemeshko M. 2015. Rotation of quantum impurities in the presence
    of a many-body environment. Physical Review Letters. 114(20), 203001.
  mla: Schmidt, Richard, and Mikhail Lemeshko. “Rotation of Quantum Impurities in
    the Presence of a Many-Body Environment.” <i>Physical Review Letters</i>, vol.
    114, no. 20, 203001, American Physical Society, 2015, doi:<a href="https://doi.org/10.1103/PhysRevLett.114.203001">10.1103/PhysRevLett.114.203001</a>.
  short: R. Schmidt, M. Lemeshko, Physical Review Letters 114 (2015).
corr_author: '1'
date_created: 2018-12-11T11:54:09Z
date_published: 2015-05-18T00:00:00Z
date_updated: 2025-09-23T10:40:28Z
day: '18'
department:
- _id: MiLe
doi: 10.1103/PhysRevLett.114.203001
external_id:
  arxiv:
  - '1502.03447'
  isi:
  - '000354969900003'
intvolume: '       114'
isi: 1
issue: '20'
language:
- iso: eng
main_file_link:
- open_access: '1'
  url: http://arxiv.org/abs/1502.03447
month: '05'
oa: 1
oa_version: Preprint
publication: Physical Review Letters
publication_status: published
publisher: American Physical Society
publist_id: '5293'
quality_controlled: '1'
scopus_import: '1'
status: public
title: Rotation of quantum impurities in the presence of a many-body environment
type: journal_article
user_id: 317138e5-6ab7-11ef-aa6d-ffef3953e345
volume: 114
year: '2015'
...