Experimental demonstration of decoherence-free one-way quantum processing
Robert Prevedel, Mark Tame, André Stefanov, Mauro Paternostro, M. S. Kim, Anton Zeilinger · arXiv (Cornell University) · 2007
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 subspace 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.