Title: Optimized Receiver Design for Entanglement-Assisted Communication using BPSK Show Chinese title

Title: 用于使用BPSK的纠缠辅助通信的优化接收器设计

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. Show Chinese abstract

Abstract: 在纠缠辅助通信中使用预共享纠缠为经典通信提供了一种更优的替代方案，尤其是在光子匮乏的环境中和高度噪声的环境下。 在本文中，我们分析了几种使用光学参量放大器的低复杂度接收机的性能。 模拟结果表明，采用纠缠辅助方案与相位移键控调制的接收机可以超越经典容量。 我们提出了一种用于纠缠辅助通信的2x2光学混合接收机，并表明其误码率比之前提出的基于光学参量放大器的接收机在超过10个模式的情况下大约低10%。 然而，在单模情况下，基于光学参量放大器的接收机的容量超过了Holevo容量以及光学相位共轭接收机和2x2光学混合接收机的容量。 数值结果表明，超越Holevo容量和同频检测容量并不需要大量的信号-闲频模式。 此外，我们发现对于BPSK使用不等先验可以比使用等先验提供大约三倍的信息速率优势。