Experimental Demonstration of Decoherence-Free One-Way Information Transfer

TL;DR

This paper demonstrates an experimental one-way quantum information transfer protocol that remains reliable under decoherence by using a decoherence-free subspace, showcasing robust quantum communication in noisy environments.

Contribution

The study introduces a practical all-optical implementation of a decoherence-free quantum protocol for one-way information transfer, enhancing robustness against noise.

Findings

Nearly ideal information transfer despite severe noise

Successful encoding in polarization states of four photons

Effective protection using decoherence-free subspace

Abstract

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.