Biomedical subjects

Grégoire Ribordy

Publications and source records attributed to Grégoire Ribordy.

2 recordsLinked to original sources

PubMed2004

Quantum cryptography protocols robust against photon number splitting attacks for weak laser pulse implementations.

We introduce a new class of quantum key distribution protocols, tailored to be robust against photon number splitting (PNS) attacks. We study one of these protocols, which differs from the original protocol by Bennett and Brassard (BB84) only in the classical sifting procedure. This protocol is provably better than BB84 against PNS attacks at zero error.

Journal Article↗

PubMed2002

Quantum cloning with an optical fiber amplifier.

It has been shown theoretically that a light amplifier working on the physical principle of stimulated emission should achieve optimal quantum cloning of the polarization state of light. We demonstrate close-to-optimal universal quantum cloning of polarization in a standard fiber amplifier for telecom wavelengths. For cloning 1-->2 we find a fidelity of 0.82, the optimal value being 5 / 6=0.83.

Journal Article↗