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Teleportation of a vacuum--one-photon qubit
Egilberto Lombardi1, Fabio Sciarrino, Sandu Popescu
1Istituto Nazionale di Fisica della Materia, Dipartimento di Fisica, Università La Sapienza, Roma, 00185 Italy.
Physical Review Letters
|February 28, 2002
Abstract:
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)%.