Multiparty quantum random access codes. (arXiv:1905.05668v2 [quant-ph] UPDATED)

Random access code (RAC), a primitive for many information processing
protocols, enables one party to encode nbit string into one bit of message such
that another party can retrieve partial information of that string. We
introduce the multiparty version of RAC in which the nbit string is distributed
among many parties. For this task, we consider two distinct quantum
communication scenarios: one allows shared quantum entanglement among the
parties with classical communication, and the other allows communication
through quantum channel. We present several multiparty quantum RAC protocols
that outclass its classical counterpart in both the aforementioned scenarios.

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