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Quantum double lock-in amplifier

التفاصيل البيبلوغرافية
العنوان: Quantum double lock-in amplifier
المؤلفون: Sijie Chen, Min Zhuang, Ruihuang Fang, Yun Chen, Chengyin Han, Bo Lu, Jiahao Huang, Chaohong Lee
المصدر: Communications Physics, Vol 7, Iss 1, Pp 1-10 (2024)
بيانات النشر: Nature Portfolio, 2024.
سنة النشر: 2024
المجموعة: LCC:Astrophysics
LCC:Physics
مصطلحات موضوعية: Astrophysics, QB460-466, Physics, QC1-999
الوصف: Abstract Quantum lock-in amplifiers have been proposed to extract an alternating signal from a strong noise background. However, due to the typical target signal has unknown initial phase, it is challenging to extract complete information about the signal’s amplitude, frequency, and initial phase. Here, we present a general protocol for achieving a quantum double lock-in amplifier by employing two quantum mixers operating under orthogonal pulse sequences. To demonstrate the practical implementation, we discuss the experimental feasibility using a five-level double-Λ coherent population trapping system with Rb atoms. Here, each Λ structure acts as a quantum mixer, and two applied dynamical decoupling sequences serve as orthogonal reference signals. Notably, the system significantly reduces the total measurement time by nearly half and mitigates time-dependent systematic errors compared to conventional two-level systems. Furthermore, our quantum double lock-in amplifier is robust against experimental imperfections. This study establishes a pathway to alternating signal measurement, thereby facilitating the development of practical quantum sensing technologies.
نوع الوثيقة: article
وصف الملف: electronic resource
اللغة: English
تدمد: 2399-3650
Relation: https://doaj.org/toc/2399-3650
DOI: 10.1038/s42005-024-01687-6
URL الوصول: https://doaj.org/article/05e71dedd65b45c281a22ad6b2200d85
رقم الأكسشن: edsdoj.05e71dedd65b45c281a22ad6b2200d85
قاعدة البيانات: Directory of Open Access Journals
الوصف
تدمد:23993650
DOI:10.1038/s42005-024-01687-6