Comment on: "Measuring a Photonic Qubit without Destroying It"
arXiv:quant-ph/0406120 · doi:10.1103/PhysRevLett.95.048901
Abstract
Recently, Pryde et al reported the demonstration of a quantum non-demolition scheme for single-photon polarization states with linear optics and projective measurements [Phys. Rev. Lett. 92, 190402 (2004)]. Here, we argue that their interpretation of the experiment is inconsistent with the fidelity measure they use.
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