Quantum mutual information capacity for high-dimensional entangled states

P. Ben Dixon*, Gregory A. Howland, James Schneeloch, John C. Howell

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

75 Scopus citations


High-dimensional Hilbert spaces used for quantum communication channels offer the possibility of large data transmission capabilities. We propose a method of characterizing the channel capacity of an entangled photonic state in high-dimensional position and momentum bases. We use this method to measure the channel capacity of a parametric down-conversion state by measuring in up to 576 dimensions per detector. We achieve a channel capacity over 7bits/photon in either the position or momentum basis. Furthermore, we provide a correspondingly high-dimensional separability bound that suggests that the channel performance cannot be replicated classically.

Original languageAmerican English
Article number143603
JournalPhysical Review Letters
Issue number14
StatePublished - 5 Apr 2012
Externally publishedYes


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