Teleportation of a vacuum--one-photon qubit.
We report the experimental realization of teleporting a one-particle entangled qubit. The qubit is physically implemented by a two-dimensional subspace of states of a mode of the electromagnetic field, specifically, the space spanned by the vacuum and the one-photon state. Our experiment follows the line suggested by Lee and Kim [Phys. Rev. A 63, 012305 (2000)] and Knill, Laflamme, and Milburn [Nature (London) 409, 46 (2001)]. An unprecedented large value of the teleportation "fidelity" has been attained: F = (95.3 +/- 0.6)%.
Lombardi
Egilberto
E
Istituto Nazionale di Fisica della Materia, Dipartimento di Fisica, Università La Sapienza, Roma, 00185 Italy.
Sciarrino
Fabio
F
Popescu
Sandu
S
De Martini
Francesco
F