A Radio-Frequency Emitter Design for the Low-Frequency Regime in Atomic Experiments
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arXiv
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| Main Authors: | , , , , , , |
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| Format: | Preprint |
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2025
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| _version_ | 1866912847154380800 |
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| author | Wei, Yudong Hu, Zhongshu Guo, Yajing Qian, Zhentian Jin, Shengjie Chen, Xuzong Liu, Xiong-jun |
| author_facet | Wei, Yudong Hu, Zhongshu Guo, Yajing Qian, Zhentian Jin, Shengjie Chen, Xuzong Liu, Xiong-jun |
| contents | Radio-frequency (RF) control is a key technique in cold atom experiments. We present a compact and efficient RF circuit based on a capacitive transformer network, where a low-frequency coil operating up to 30MHz serves as both an intrinsic inductor and a power-sharing element. The design enables high current delivery and flexible impedance matching across a wide frequency range. We integrate both broadband and narrowband RF networks into a unified configuration that overcomes the geometric constraints imposed by the metallic chamber. In evaporative cooling, the broadband network allows a reduction of the applied RF input power from 14.7dBW to -3.5dBW, owing to its non-zero coil current even at ultra-low frequencies. This feature enables the Bose-Fermi mixture to be cooled below 10μK. In a Landau-Zener protocol, the coil driven by the narrowband network transfers 80% of rubidium atoms from |F = 2,mF = 2> to |2,-2> in 1 millisecond, achieving a Rabi frequency of approximately 9 kHz at an input power of 0.1dBW. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2502_11549 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | A Radio-Frequency Emitter Design for the Low-Frequency Regime in Atomic Experiments Wei, Yudong Hu, Zhongshu Guo, Yajing Qian, Zhentian Jin, Shengjie Chen, Xuzong Liu, Xiong-jun Atomic Physics Quantum Gases Radio-frequency (RF) control is a key technique in cold atom experiments. We present a compact and efficient RF circuit based on a capacitive transformer network, where a low-frequency coil operating up to 30MHz serves as both an intrinsic inductor and a power-sharing element. The design enables high current delivery and flexible impedance matching across a wide frequency range. We integrate both broadband and narrowband RF networks into a unified configuration that overcomes the geometric constraints imposed by the metallic chamber. In evaporative cooling, the broadband network allows a reduction of the applied RF input power from 14.7dBW to -3.5dBW, owing to its non-zero coil current even at ultra-low frequencies. This feature enables the Bose-Fermi mixture to be cooled below 10μK. In a Landau-Zener protocol, the coil driven by the narrowband network transfers 80% of rubidium atoms from |F = 2,mF = 2> to |2,-2> in 1 millisecond, achieving a Rabi frequency of approximately 9 kHz at an input power of 0.1dBW. |
| title | A Radio-Frequency Emitter Design for the Low-Frequency Regime in Atomic Experiments |
| topic | Atomic Physics Quantum Gases |
| url | https://arxiv.org/abs/2502.11549 |