Optimized receiver design for entanglement-assisted communication using BPSK

Rahul Bhadani, Ivan B. Djordjevic

Research output: Contribution to journalArticlepeer-review


The use of pre-shared entanglement in entanglement-assisted communication offers a superior alternative to classical communication, especially in the photon-starved regime and highly noisy environments. In this paper, we analyze the performance of several low-complexity receivers that use optical parametric amplifiers. The simulations demonstrate that receivers employing an entanglement-assisted scheme with phase-shift-keying modulation can outperform classical capacities. We present a 2x2 optical hybrid receiver for entanglement-assisted communication and show that it has a roughly 10% lower error probability compared to previously proposed optical parametric amplifier-based receivers for more than 10 modes. However, the capacity of the optical parametric amplifier-based receiver exceeds the Holevo capacity and the capacities of the optical phase conjugate receiver and 2x2 optical hybrid receiver in the case of a single mode. The numerical findings indicate that surpassing the Holevo and Homodyne capacities does not require a large number of signal-idler modes. Furthermore, we find that using unequal priors for BPSK provides roughly three times the information rate advantage over equal priors.

Original languageEnglish (US)
Pages (from-to)39765-39783
Number of pages19
JournalOptics Express
Issue number24
StatePublished - Nov 20 2023

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics


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