Quantum noise in a squeezed-light-enhanced multiparameter quantum sensor
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| Format: | Preprint |
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2025
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| author | Sierant, Aleksandra Méndez-Avalos, Diana Giraldo, Santiago Tabares Mitchell, Morgan W. |
| author_facet | Sierant, Aleksandra Méndez-Avalos, Diana Giraldo, Santiago Tabares Mitchell, Morgan W. |
| contents | We study quantum enhancement of sensitivity using squeezed light in a multi-parameter quantum sensor, the hybrid dc-rf optically pumped magnetometer (hOPM) [Phys. Rev. Applied 21, 034054, (2024)]. Using a single spin ensemble, the hOPM acquires both the dc field strength (scalar magnetometry), and resonantly detects one quadrature of the ac magnetic field at a chosen frequency (rf magnetometry). In contrast to the Bell-Bloom scalar magnetometer [Phys. Rev. Lett. 127, 193601 (2021)], the back-action evasion in the hOPM is incomplete, leading to a nontrivial interplay of the three quantum noise sources in this system: photon shot noise, spin projection noise, and measurement back-action noise. We observe these interactions using squeezed light as a tool to control the distribution of optical quantum noise between $S_2$ and $S_3$ polarization Stokes components, and the resulting effect on readout quantum noise and measurement back-action. These results demonstrate quantum-enhanced sensitivity in a continuously operating multi-parameter sensor and reveal fundamental trade-offs between sensitivity, back-action, and bandwidth. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2506_08190 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Quantum noise in a squeezed-light-enhanced multiparameter quantum sensor Sierant, Aleksandra Méndez-Avalos, Diana Giraldo, Santiago Tabares Mitchell, Morgan W. Quantum Physics Applied Physics Atomic Physics Instrumentation and Detectors We study quantum enhancement of sensitivity using squeezed light in a multi-parameter quantum sensor, the hybrid dc-rf optically pumped magnetometer (hOPM) [Phys. Rev. Applied 21, 034054, (2024)]. Using a single spin ensemble, the hOPM acquires both the dc field strength (scalar magnetometry), and resonantly detects one quadrature of the ac magnetic field at a chosen frequency (rf magnetometry). In contrast to the Bell-Bloom scalar magnetometer [Phys. Rev. Lett. 127, 193601 (2021)], the back-action evasion in the hOPM is incomplete, leading to a nontrivial interplay of the three quantum noise sources in this system: photon shot noise, spin projection noise, and measurement back-action noise. We observe these interactions using squeezed light as a tool to control the distribution of optical quantum noise between $S_2$ and $S_3$ polarization Stokes components, and the resulting effect on readout quantum noise and measurement back-action. These results demonstrate quantum-enhanced sensitivity in a continuously operating multi-parameter sensor and reveal fundamental trade-offs between sensitivity, back-action, and bandwidth. |
| title | Quantum noise in a squeezed-light-enhanced multiparameter quantum sensor |
| topic | Quantum Physics Applied Physics Atomic Physics Instrumentation and Detectors |
| url | https://arxiv.org/abs/2506.08190 |