Diagnosis, prescription and prognosis of a Bell-state filter by quantum process tomography
arXiv:quant-ph/0305001 · doi:10.1103/PhysRevLett.91.120402
Abstract
Using a Hong-Ou-Mandel interferometer, we apply the techniques of quantum process tomography to characterize errors and decoherence in a prototypical two-photon operation, a singlet-state filter. The quantum process tomography results indicate a large asymmetry in the process and also the required operation to correct for this asymmetry. Finally, we quantify errors and decoherence of the filtering operation after this modification.
4 pages, 4 figures