@misc{indiciae4c3d0c0bb78b,
  title = {Effective quantum spin systems with trapped ions.},
  author = {D Porras and J I Cirac},
  year = {2004},
  doi = {10.1103/physrevlett.92.207901},
  url = {https://pubmed.ncbi.nlm.nih.gov/15169383/},
  note = {Source identifier: 15169383}
}