微波功率到频率的转换：在磁引发的里德伯耗散时间晶体中

中文摘要 AI 辅助

利用磁引发的里德伯耗散时间晶体（DTC）的自发振荡频率，演示了微波功率到频率的转换。在室温下的87Rb蒸气中，约14 G的磁场在21 kHz附近建立了自持的DTC，而耦合63D3/2至64P3/2能级的近共振8.325 GHz场持续移动自主振荡频率。由此产生的场-频率传递函数呈强非线性，总基频偏移约6.7 kHz，峰值响应度接近1 kHz/(mV/cm)。非线性转变明显比简单的二次饱和响应更陡峭，并通过自洽平均场图像捕捉，其中微波驱动的里德伯布居重新分布改变了集体共振条件。更高的DTC谐波保持相同的归一化传递函数，同时绝对响应度随谐波阶次近似线性增长。这些结果建立了内在的多体原子路径，用于射频幅度到频率的转换，使得通过涌现的原子频率实现连续频域传感，而无需外部工程的射频反馈振荡器、重复的光谱扫描或分辨的Autler-Townes分裂。

英文摘要

Microwave power-to-frequency transduction is demonstrated using the emergent oscillation frequency of a magnetically initiated Rydberg dissipative time crystal (DTC). In a room-temperature 87Rb vapor, a ~14 G magnetic field establishes a self-sustained DTC near 21 kHz, while a near-resonant 8.325 GHz field coupling the 63D3/2 to 64P3/2 manifold continuously shifts the autonomous oscillation frequency. The resulting field-to-frequency transfer function is strongly nonlinear, with a total fundamental-frequency excursion of ~6.7 kHz and peak responsivity approaching 1 kHz/(mV/cm). The nonlinear transition is substantially steeper than a simple quadratic saturation response and is captured by a self-consistent mean-field picture in which microwave-driven Rydberg-population redistribution modifies the collective resonance condition. Higher DTC harmonics preserve the same normalized transfer function while exhibiting approximately linear growth of absolute responsivity with harmonic order. These results establish an intrinsic many-body atomic route to RF amplitude-to-frequency conversion, enabling continuous frequency-domain sensing through an emergent atomic frequency without an externally engineered RF feedback oscillator, repeated optical spectral scans, or resolved Autler Townes splitting.

发表机构

• Jet Propulsion Laboratory, California Institute of Technology（加州理工学院，喷气推进实验室）

机构由 AI 辅助整理，请以论文原文为准。