@misc{indiciaee35aeb35b2f1,
  title = {Population trapping in two-level models: Spectral and statistical properties.},
  author = {JI Cirac and LL Sánchez-Soto},
  year = {1991},
  doi = {10.1103/physreva.44.3317},
  url = {https://pubmed.ncbi.nlm.nih.gov/9906332/},
  note = {Source identifier: 9906332}
}