论文标题
Rydberg原子电表瞬时响应及其对射频脉冲传感的影响
The Origins of Rydberg Atom Electrometer Transient Response and its Impact on Radio Frequency Pulse Sensing
论文作者
论文摘要
Rydberg原子已显示出很大的前景，作为高度敏感的连续射频（RF）电子田地的基础。在这里，我们在室温下使用瓶中蒸气电池研究了他们对脉冲调节的RF电子场对脉冲调节电场的反应。我们使用密度矩阵模拟来解释在不同激光条件下塑造瞬时原子响应的时间尺度，发现它们受到限制，包括转运时间扩展，Rydberg-Rydberg碰撞和电离。使用匹配的过滤器，我们演示了持续时间从10 $ $ s降至50 ns的单个脉冲的检测，并从15000 $μ$ v cm $^cm $^{ - 1} $降低到〜170 $ $ v cm $^cm $^{ - 1} $，对应于〜240 nv cm $ $ $^$^$^$^$^ - 1} $^ - 1} $^ - 1}最后，我们通过在模拟的通过飞机上检测到旋转发射极的脉冲列来强调了Rydberg Vapor电池作为接收器的潜力。
Rydberg atoms have shown significant promise as the basis for highly sensitive detectors of continuous radio-frequency (RF) E-fields. Here, we study their time-dependent response to pulse-modulated RF E-fields at 19.4 GHz using a cesium vapour cell at room temperature. We use density matrix simulations to explain the time scales that shape the transient atomic response under different laser conditions, finding them to be limited by dephasing mechanisms including transit time broadening, Rydberg-Rydberg collisions, and ionization. Using a matched filter, we demonstrate the detection of individual pulses with durations from 10 $μ$s down to 50 ns and amplitudes from 15000 $μ$V cm$^{-1}$ down to ~170 $μ$V cm$^{-1}$, corresponding to a sensitivity of ~240 nV cm$^{-1}$ Hz$^{-1/2}$. Finally, we highlight the potential of a Rydberg vapour cell as a receiver by detecting pulse trains from a rotating emitter on a simulated passing aircraft.
