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| Main Authors: | , , , , , |
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| Format: | Preprint |
| Published: |
2025
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2506.23250 |
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| _version_ | 1866916815562604544 |
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| author | Otabe, Sotatsu Kaku, Naoki Sato, Tomoya Miranda, Martin Kawasaki, Takuya Kozuma, Mikio |
| author_facet | Otabe, Sotatsu Kaku, Naoki Sato, Tomoya Miranda, Martin Kawasaki, Takuya Kozuma, Mikio |
| contents | Quantum sensors based on atom interferometers are advancing both fundamental physics and practical applications, with higher sensitivity being a key requirement for these investigations. Here, we experimentally demonstrate a sensitivity enhancement of an atom-interferometer gyroscope using a phase-modulation signal readout scheme. Phase modulation applied to the laser light used for atomic state manipulation is transferred to the atomic phase and read out via multi-harmonic demodulation. The observed sensitivity improvement factor of $1.20\pm0.04$ over the conventional phase sweep scheme agrees with theoretical predictions. We also found that phase-dispersion compensation control, which compensates atomic velocity dispersion and preserves interference contrast at high angular rates, effectively eliminates the nonlinearity inherent in multi-harmonic demodulation. The sensitivity improvement achieved by our method is applicable to a broad class of atom interferometers and requires no modifications to the optical or vacuum systems, making it particularly effective for size-constrained applications such as large-baseline experiments and inertial navigation systems. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2506_23250 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Sensitivity Enhancement in Atom-Interferometer Gyroscopes via Phase-Modulation Signal Readout Scheme Otabe, Sotatsu Kaku, Naoki Sato, Tomoya Miranda, Martin Kawasaki, Takuya Kozuma, Mikio Atomic Physics Quantum sensors based on atom interferometers are advancing both fundamental physics and practical applications, with higher sensitivity being a key requirement for these investigations. Here, we experimentally demonstrate a sensitivity enhancement of an atom-interferometer gyroscope using a phase-modulation signal readout scheme. Phase modulation applied to the laser light used for atomic state manipulation is transferred to the atomic phase and read out via multi-harmonic demodulation. The observed sensitivity improvement factor of $1.20\pm0.04$ over the conventional phase sweep scheme agrees with theoretical predictions. We also found that phase-dispersion compensation control, which compensates atomic velocity dispersion and preserves interference contrast at high angular rates, effectively eliminates the nonlinearity inherent in multi-harmonic demodulation. The sensitivity improvement achieved by our method is applicable to a broad class of atom interferometers and requires no modifications to the optical or vacuum systems, making it particularly effective for size-constrained applications such as large-baseline experiments and inertial navigation systems. |
| title | Sensitivity Enhancement in Atom-Interferometer Gyroscopes via Phase-Modulation Signal Readout Scheme |
| topic | Atomic Physics |
| url | https://arxiv.org/abs/2506.23250 |