@article{1206,
  abstract     = {We study a polar molecule immersed in a superfluid environment, such as a helium nanodroplet or a Bose–Einstein condensate, in the presence of a strong electrostatic field. We show that coupling of the molecular pendular motion, induced by the field, to the fluctuating bath leads to formation of pendulons—spherical harmonic librators dressed by a field of many-particle excitations. We study the behavior of the pendulon in a broad range of molecule–bath and molecule–field interaction strengths, and reveal that its spectrum features a series of instabilities which are absent in the field-free case of the angulon quasiparticle. Furthermore, we show that an external field allows to fine-tune the positions of these instabilities in the molecular rotational spectrum. This opens the door to detailed experimental studies of redistribution of orbital angular momentum in many-particle systems. © 2016 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim},
  author       = {Redchenko, Elena and Lemeshko, Mikhail},
  journal      = {ChemPhysChem},
  number       = {22},
  pages        = {3649 -- 3654},
  publisher    = {Wiley-Blackwell},
  title        = {{Libration of strongly oriented polar molecules inside a superfluid}},
  doi          = {10.1002/cphc.201601042},
  volume       = {17},
  year         = {2016},
}