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@ARTICLE{Astrakharchik:904590,
      author       = {Astrakharchik, Grigory E. and Ardila, Luis A. Peña and
                      Schmidt, Richard and Jachymski, Krzysztof and Negretti,
                      Antonio},
      title        = {{I}onic polaron in a {B}ose-{E}instein condensate},
      journal      = {Communications Physics},
      volume       = {4},
      number       = {1},
      issn         = {2399-3650},
      address      = {London},
      publisher    = {Springer Nature},
      reportid     = {FZJ-2021-06160},
      pages        = {94},
      year         = {2021},
      abstract     = {The presence of strong interactions in a many-body quantum
                      system can lead to a variety of exotic effects. Here we show
                      that even in a comparatively simple setup consisting of a
                      charged impurity in a weakly interacting bosonic medium the
                      competition of length scales gives rise to a highly
                      correlated mesoscopic state. Using quantum Monte Carlo
                      simulations, we unravel its vastly different polaronic
                      properties compared to neutral quantum impurities. Moreover,
                      we identify a transition between the regime amenable to
                      conventional perturbative treatment in the limit of weak
                      atom-ion interactions and a many-body bound state with
                      vanishing quasi-particle residue composed of hundreds of
                      atoms. In order to analyze the structure of the
                      corresponding states, we examine the atom-ion and atom-atom
                      correlation functions which both show nontrivial properties.
                      Our findings are directly relevant to experiments using
                      hybrid atom-ion setups that have recently attained the
                      ultracold regime.},
      cin          = {PGI-8},
      ddc          = {530},
      cid          = {I:(DE-Juel1)PGI-8-20190808},
      pnm          = {2124 - Advanced research methodologies for tomorrow
                      (POF4-212) / 5221 - Advanced Solid-State Qubits and Qubit
                      Systems (POF4-522)},
      pid          = {G:(DE-HGF)POF4-2124 / G:(DE-HGF)POF4-5221},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000649372600001},
      doi          = {10.1038/s42005-021-00597-1},
      url          = {https://juser.fz-juelich.de/record/904590},
}