Ontology highlight
ABSTRACT:
SUBMITTER: Hu XM
PROVIDER: S-EPMC6054506 | biostudies-literature | 2018 Jul
REPOSITORIES: biostudies-literature
Hu Xiao-Min XM Guo Yu Y Liu Bi-Heng BH Huang Yun-Feng YF Li Chuan-Feng CF Guo Guang-Can GC
Science advances 20180720 7
Quantum superdense coding protocols enhance channel capacity by using shared quantum entanglement between two users. The channel capacity can be as high as 2 when one uses entangled qubits. However, this limit can be surpassed by using high-dimensional entanglement. We report an experiment that exceeds the limit using high-quality entangled ququarts with fidelities up to 0.98, demonstrating a channel capacity of 2.09 ± 0.01. The measured channel capacity is also higher than that obtained when tr ...[more]