Diagnosis, prescription and prognosis of a Bell-state filter by quantum process tomography

Details Diagnosis, prescription and prognosis of a Bell-state filter by quantum process tomography Diagnosis, prescription and prognosis of a Bell-state filter by quantum process tomography

2003-04-30

arxiv.org/abs/quant-ph/0305001v1

Physics

Quantum Physics

4 pages, 4 figures

Scientific paper

10.1103/PhysRevLett.91.120402

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.

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