Cold-Atom Buoy: A Differential Magnetic Sensing Technique in Cold Quadrupole Traps
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arXiv
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| Main Authors: | , , , , , , , , , |
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| Format: | Preprint |
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2025
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| _version_ | 1866911730310840320 |
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| author | Kurkó, Árpád Nagy, Dávid Simon, Alexandra Clark, Thomas W. Dombi, András Varga, Dániel Williams, Francis B. Fortágh, József Domokos, Peter Vukics, András |
| author_facet | Kurkó, Árpád Nagy, Dávid Simon, Alexandra Clark, Thomas W. Dombi, András Varga, Dániel Williams, Francis B. Fortágh, József Domokos, Peter Vukics, András |
| contents | We present a differential technique for vector magnetic sensing based on a cold-atom cloud in a magnetic quadrupole trap. An external homogeneous magnetic field displaces the trap center in a direction and magnitude proportional to the field. By reversing the quadrupole polarity between experimental shots and comparing the resulting cloud positions, we extract a differential displacement signal that is free from common-mode effects such as gravity and weak magnetic-field inhomogeneities. The signal is directionally proportional to the external field and requires only absorption imaging, without spectroscopic interrogation. Assuming micron-scale position resolution, the technique enables field resolution at the milli-Gauss level. It offers a practical tool for field compensation in magnetically sensitive experimental stages, bridging operational regimes from Earth-level fields to atomic magnetometry. A straightforward extension to full three-dimensional sensing is possible with only a minimal addition to standard cold-atom infrastructure. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2511_08797 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Cold-Atom Buoy: A Differential Magnetic Sensing Technique in Cold Quadrupole Traps Kurkó, Árpád Nagy, Dávid Simon, Alexandra Clark, Thomas W. Dombi, András Varga, Dániel Williams, Francis B. Fortágh, József Domokos, Peter Vukics, András Quantum Physics Quantum Gases Atomic Physics We present a differential technique for vector magnetic sensing based on a cold-atom cloud in a magnetic quadrupole trap. An external homogeneous magnetic field displaces the trap center in a direction and magnitude proportional to the field. By reversing the quadrupole polarity between experimental shots and comparing the resulting cloud positions, we extract a differential displacement signal that is free from common-mode effects such as gravity and weak magnetic-field inhomogeneities. The signal is directionally proportional to the external field and requires only absorption imaging, without spectroscopic interrogation. Assuming micron-scale position resolution, the technique enables field resolution at the milli-Gauss level. It offers a practical tool for field compensation in magnetically sensitive experimental stages, bridging operational regimes from Earth-level fields to atomic magnetometry. A straightforward extension to full three-dimensional sensing is possible with only a minimal addition to standard cold-atom infrastructure. |
| title | Cold-Atom Buoy: A Differential Magnetic Sensing Technique in Cold Quadrupole Traps |
| topic | Quantum Physics Quantum Gases Atomic Physics |
| url | https://arxiv.org/abs/2511.08797 |