Communication over entanglement-breaking channels with unreliable entanglement assistance

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Entanglement assistance can improve communication rates significantly. Yet its generation is susceptible to failure. The unreliable assistance model accounts for those challenges. Previous work provided an asymptotic formula that outlined the tradeoff between the unassisted and excess rates from entanglement assistance. We derive a full characterization for entanglement-breaking channels and show that combining entanglement-assisted and unassisted coding is suboptimal. From a networking perspective, this finding is nontrivial and highlights a quantum behavior arising from superposition.

Original languageEnglish
Article number042616
JournalPhysical Review A
Issue number4
StatePublished - Oct 2023

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics


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