AI 中文总结
本文提出基于电路的量子MIMO设计，采用变分量子电路接收机，在NISQ条件下与经典检测器对比，发现其在强耦合复杂干扰场景下性能更稳定，是经典检测的互补方案。
AI 中文摘要
本文研究经典多输入多输出（MIMO）通信的量子扩展，其中传统线性信道模型被参数化多量子比特幺正变换取代。在此框架下，干扰通过相干量子相互作用而非加性信号耦合表示。为恢复传输信息，引入变分量子电路（VQC）接收机，其通过监督变分优化学习近似逆信道变换。所提系统在含去极化噪声、热弛豫及测量缺陷的现实噪声中等规模量子（NISQ）条件下评估，性能与标准经典检测方法对比。结果显示两种方法存在权衡：经典检测器在多数研究参数范围内实现低得多的误码率（BER），但在特定信道配置下表现出明显性能下降；而VQC接收机随信道复杂度增加保持更均匀的误码分布，尽管平均BER更高。这些发现表明，变分量子接收机并非经典检测方法的直接替代，而是一种互补方法，可在强耦合与复杂干扰模式的通信场景中提供更高的性能稳定性。
英文摘要
This paper investigates a quantum extension of classical Multiple-Input Multiple-Output (MIMO) communication in which the conventional linear channel model is replaced by a parameterized multi-qubit unitary transformation. Within this framework, interference is represented through coherent quantum interactions rather than additive signal coupling. To recover transmitted information, a Variational Quantum Circuit (VQC) receiver is introduced that learns an approximate inverse channel transformation through supervised variational optimization. The proposed system is evaluated under realistic noisy intermediate-scale quantum (NISQ) conditions incorporating depolarizing noise, thermal relaxation, and measurement imperfections, and its performance is compared with that of standard classical detection methods. The results reveal a trade-off between the two approaches: classical detectors achieve substantially lower bit-error rates across much of the investigated parameter range but exhibit pronounced performance degradation for specific channel configurations, whereas the VQC receiver maintains a more uniform error profile as channel complexity increases, albeit at a higher average BER. These findings suggest that variational quantum receivers are not a direct replacement for classical detection methods, but rather a complementary approach that may offer increased performance stability in communication scenarios characterized by strong coupling and complex interference patterns.
Comments37 pages, 15 figures
