Experimental Purification of Single Qubits
Marco Ricci, F. De Martini, Nicolas J. Cerf, Radim Filip, Jaromı́r Fiurášek, Chiara Macchiavello · Physical Review Letters · 2004
We report the experimental realization of the purification protocol for single qubits sent through a depolarizing channel. The qubits are associated with polarization states of single photons and the protocol is achieved by means of passive linear optical elements. The present approach may represent a convenient alternative to the distillation and error correction protocols of quantum information.