Experimental demonstration of decoherence-free one-way information transfer.
We report the experimental demonstration of a one-way quantum protocol reliably operating in the presence of decoherence. Information is protected by designing an appropriate decoherence-free sub-space for a cluster state resource. We demonstrate our scheme in an all-optical setup, encoding the information into the polarization states of four photons. A measurement-based one-way information-transfer protocol is performed with the photons exposed to severe symmetric phase-damping noise. Remarkable protection of information is accomplished, delivering nearly ideal outcomes.
Prevedel
R
R
Faculty of Physics, University of Vienna, Boltzmanngasse 5, A-1090 Vienna, Austria.
Tame
M S
MS
Stefanov
A
A
Paternostro
M
M
Kim
M S
MS
Zeilinger
A
A