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- W4382131010 abstract "Shared entanglement boosts classical correlations between systems that interact over a limited quantum channel. To create such correlations, a natural avenue is to use entanglement of the same dimension as the channel, as this leads to unitary encodings similar to the celebrated dense coding protocol. In contrast, we demonstrate that by using an entanglement dimension larger than that of the channel and encoding classical information via irreversible quantum operations, one can outperform every such quantum protocol. We showcase this in a task that hybridizes state discrimination and random access coding, implemented by encoding the systems in distinct and independently controlled paths of a single photon. The experiment combines several high-quality building blocks for path-mode single-photon quantum operations: four-dimensional entanglement, quantum compression operations and high-dimensional entangled projections, achieving a total protocol fidelity of over $97.0%$. It constitutes a proof-of-concept for harvesting higher-dimensional entanglement to improve low-dimensional quantum communication without relying on detailed modeling of the involved quantum devices." @default.
- W4382131010 created "2023-06-27" @default.
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- W4382131010 date "2023-06-23" @default.
- W4382131010 modified "2023-09-25" @default.
- W4382131010 title "Experimental higher-dimensional entanglement advantage over qubit channel" @default.
- W4382131010 doi "https://doi.org/10.48550/arxiv.2306.13495" @default.
- W4382131010 hasPublicationYear "2023" @default.
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