Title: Interference Resilient Quantum Receivers with Rydberg Atoms Show Chinese title

Title: 具有里德堡原子的抗干扰量子接收器

Abstract: Quantum sensing has attracted significant attention due to its ability to measure physical quantities with extremely high accuracy. Rydberg atoms - typically alkali atoms with a highly excited valence electron that is far from the nucleus - exhibit strong sensitivity to external electromagnetic fields. This sensitivity leads to coupling between different atomic energy levels, which can be observed by monitoring changes in a control laser beam before and after it passes through a vapor cell containing the Rydberg atoms. By analyzing the transmitted laser signal with a photodetector, variations in transmission can be attributed to the presence and characteristics of the external electromagnetic field. Because Rydberg atoms operate in a highly excited quantum state without relying on traditional electronic circuitry, they inherently avoid thermal noise, thereby enabling more sensitive detection. In this paper, we investigate the performance of a Rydberg atomic receiver based on Rb-85 and compare it with that of a conventional receiver in detecting an 8-level pulse amplitude modulation (8-PAM) signal in the presence of off-resonant interference. We demonstrate that the Rydberg receiver can suppress interference without the need for an additional filter. Effectively, our results show that the Rydberg receiver serves as an integrated filter and demodulator, outperforming conventional circuit-based receivers in terms of achievable symbol error rate Show Chinese abstract

Abstract: 量子传感因其能够以极高的精度测量物理量而受到广泛关注。 里德堡原子——通常是指价电子远离原子核的碱金属原子——对外部电磁场具有很强的敏感性。 这种敏感性导致不同原子能级之间的耦合，可以通过在通过含有里德堡原子的蒸气室前后监测控制激光束的变化来观察。 通过用光电探测器分析透射的激光信号，可以将透射变化归因于外部电磁场的存在和特性。 由于里德堡原子在高度激发的量子态下工作，而不依赖传统的电子电路，因此它们本质上避免了热噪声，从而实现了更灵敏的检测。 在本文中，我们研究了基于Rb-85的里德堡原子接收器的性能，并将其与传统接收器在存在非共振干扰的情况下检测8电平脉冲幅度调制（8-PAM）信号的性能进行了比较。 我们证明，里德堡接收器无需额外滤波器即可抑制干扰。 实际上，我们的结果表明，里德堡接收器作为一种集成滤波器和解调器，在可实现的符号错误率方面优于传统电路接收器。