@article{14845,
  abstract     = {We study a linear rotor in a bosonic bath within the angulon formalism. Our focus is on systems where isotropic or anisotropic impurity-boson interactions support a shallow bound state. To study the fate of the angulon in the vicinity of bound-state formation, we formulate a beyond-linear-coupling angulon Hamiltonian. First, we use it to study attractive, spherically symmetric impurity-boson interactions for which the linear rotor can be mapped onto a static impurity. The well-known polaron formalism provides an adequate description in this limit. Second, we consider anisotropic potentials, and show that the presence of a shallow bound state with pronounced anisotropic character leads to a many-body instability that washes out the angulon dynamics.},
  author       = {Dome, Tibor and Volosniev, Artem and Ghazaryan, Areg and Safari, Laleh and Schmidt, Richard and Lemeshko, Mikhail},
  issn         = {2469-9969},
  journal      = {Physical Review B},
  number       = {1},
  publisher    = {American Physical Society},
  title        = {{Linear rotor in an ideal Bose gas near the threshold for binding}},
  doi          = {10.1103/PhysRevB.109.014102},
  volume       = {109},
  year         = {2024},
}