Quantum measurement of power‐frequency electric field based on amplitude modulation technology

doi:10.3969/j.issn.1007-5461.2026.04.012

Abstract

Abstract: The power-frequency electric field measurement scheme based on amplitude modulation leverages the high electric field sensitivity of Rydberg atoms to modulate the power-frequency field onto a radio frequency (RF) signal with high-frequency, and effectively addresses the challenge of low-frequency electric field shielding. This study examines the impact of RF carrier frequency on the electric field strength within a Rydberg atom vapor cell, as well as the response characteristics of electromagnetically induced transparency spectra under RF fields. Firstly, the power-frequency electric field measurement scheme is optimized regarding amplitude modulation operating parameters, with the carrier frequency being determined as 120 MHz and the carrier amplitude as 2 V/cm. Then, with these configuration parameters, precise measurement of power-frequency electric field strengths in the range of 0-2 V/cm is achieved, with the measurement error controlled within 0.377% and the frequency measurement uncertainty better than 0.5%. This improved method provides a basis for parameter settings in the power-frequency electric field measurement process, enhancing operational feasibility for practical applications and offering an effective reference for high-precision measurement of power-frequency electric fields.

Key words: quantum measurement, Rydberg atom, electromagnetically induced transparency, amplitude modulation, power-frequency electric field

CLC Number:

O562

DING Chao , PU Zengxin , SONG Hongtian , ZHANG Ying , WANG Baoshuai , , ZHANG Huaiqing , HU Shanshan , , HUANG Yu , WU Yuhao . Quantum measurement of power‐frequency electric field based on amplitude modulation technology[J]. Chinese Journal of Quantum Electronics, 2026, 43(4): 632-640.

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