---
res:
  bibo_abstract:
  - Trapped-ion systems are a leading platform for quantum information processing,
    but they are currently limited to 1D and 2D arrays, which imposes restrictions
    on both their scalability and their range of applications. Here, we propose a
    path to overcome this limitation by demonstrating that Penning traps can be used
    to realize remarkably clean bilayer crystals, wherein hundreds of ions self-organize
    into two well-defined layers. These bilayer crystals are made possible by the
    inclusion of an anharmonic trapping potential, which is readily implementable
    with current technology. We study the normal modes of this system and discover
    salient differences compared to the modes of single-plane crystals. The bilayer
    geometry and the unique properties of the normal modes open new opportunities—in
    particular, in quantum sensing and quantum simulation—that are not straightforward
    in single-plane crystals. Furthermore, we illustrate that it may be possible to
    extend the ideas presented here to realize multilayer crystals with more than
    two layers. Our work increases the dimensionality of trapped-ion systems by efficiently
    utilizing all three spatial dimensions, and it lays the foundation for a new generation
    of quantum information processing experiments with multilayer 3D crystals of trapped
    ions.@eng
  bibo_authorlist:
  - foaf_Person:
      foaf_givenName: Samarth
      foaf_name: Hawaldar, Samarth
      foaf_surname: Hawaldar
      foaf_workInfoHomepage: http://www.librecat.org/personId=221708e1-1ff6-11ee-9fa6-85146607433e
    orcid: 0000-0002-1965-4309
  - foaf_Person:
      foaf_givenName: Prakriti
      foaf_name: Shahi, Prakriti
      foaf_surname: Shahi
  - foaf_Person:
      foaf_givenName: Allison L.
      foaf_name: Carter, Allison L.
      foaf_surname: Carter
  - foaf_Person:
      foaf_givenName: Ana Maria
      foaf_name: Rey, Ana Maria
      foaf_surname: Rey
  - foaf_Person:
      foaf_givenName: John J.
      foaf_name: Bollinger, John J.
      foaf_surname: Bollinger
  - foaf_Person:
      foaf_givenName: Athreya
      foaf_name: Shankar, Athreya
      foaf_surname: Shankar
  bibo_doi: 10.1103/PhysRevX.14.031030
  bibo_issue: '3'
  bibo_volume: 14
  dct_date: 2024^xs_gYear
  dct_identifier:
  - UT:001293977800002
  dct_isPartOf:
  - http://id.crossref.org/issn/2160-3308
  dct_language: eng
  dct_publisher: American Physical Society@
  dct_title: Bilayer crystals of trapped ions for quantum information processing@
...