@misc{indiciae6bafde964991,
  title = {Geometric phases for mixed states in interferometry.},
  author = {E Sjöqvist and A K Pati and A Ekert and J S Anandan and M Ericsson and D K Oi and V Vedral},
  year = {2000},
  doi = {10.1103/physrevlett.85.2845},
  url = {https://pubmed.ncbi.nlm.nih.gov/11005950/},
  note = {Source identifier: 11005950}
}