Atom-light-correlated quantum interferometer with memory-induced phase comb

• URL: http://arxiv.org/abs/2410.23674v1
• Date: Thu, 31 Oct 2024 06:49:22 GMT
• Title: Atom-light-correlated quantum interferometer with memory-induced phase comb
• Authors: Wenfeng Huang, Xinyun Liang, Jie Zhao, Zeliang Wu, Keye Zhang, Chun-Hua Yuan, Yuan Wu, Bixuan Fan, Weiping Zhang, Liqing Chen,
• Abstract summary: We show an atom-light hybrid quantum interferometry whose sensitivity is enhanced beyond the standard quantum limit () with uncorrelated particles N. A phase sensitivity beyond the standard quantum limit of up to $8.3pm 0.2$ dB is achieved, especially at $N=4 times1013/s$. This technique can advance sensitive quantum measurements in various fields.
• Score: 5.735248514488843
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• Abstract: Precise phase measurements by interferometers are crucial in science for detecting subtle changes, such as gravitational waves. However, phase sensitivity is typically limited by the standard quantum limit (SQL) with uncorrelated particles N. This limit can be surpassed using quantum correlations, but achieving high-quality correlations in large systems is challenging. Here, we propose and demonstrate an atom-light hybrid quantum interferometry whose sensitivity is enhanced beyond the SQL with atom-light quantum correlation and newly developed phase comb superposition via atomic-memory-assisted multiple quantum amplification. Finally, a phase sensitivity beyond the SQL of up to $8.3\pm 0.2$ dB is achieved, especially at $N=4 \times10^{13}/s$, resulting in both atomic and optical phase sensitivities of $6\times10^{-8} rad/\sqrt{Hz}$. This technique can advance sensitive quantum measurements in various fields.

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