The realization of an ancilla-free 1→2 phase-covariant quantum cloner was discussed. It was found that the cloner was realized by interfering a linearly polarized photon which was desired to clone with a circularly polarized photon at a beam splitter. The fidelity of the cloning was calculated from the peak and base values of the H-H coincidences. It was observed that the fidelity of the cloner was 0.829±0.008 for the 0/90 basis.
|Original language||American English|
|Journal||Physical Review A - Atomic, Molecular, and Optical Physics|
|State||Published - Jul 2004|
Bibliographical noteFunding Information:
We would like to thank V. Buzek and Mark Hillery for helpful comments and several readings of various manuscripts. J.C.H. gratefully acknowledges support from the NSF, the Research Corporation, and the University of Rochester.