Optimized Receiver Design for Entanglement-Assisted Communication using BPSK

• URL: http://arxiv.org/abs/2407.02592v1
• Date: Tue, 2 Jul 2024 18:28:46 GMT
• Title: Optimized Receiver Design for Entanglement-Assisted Communication using BPSK
• Authors: Rahul Bhadani, Ivan B. Djordjevic,
• Abstract summary: We present a 2x2 optical hybrid receiver for entanglement-assisted communication. We show that it has a roughly 10% lower error probability compared to previously proposed optical parametric amplifier-based receivers for more than 10 modes.
• Score: 0.8287206589886882
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: 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.

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