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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/2507.19157 |
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| _version_ | 1866908652149932032 |
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| author | Gaudout, Samuel Si-Ahmed, Rayan Debavelaere, Clément Door, Menno Cladé, Pierre Guellati-Khelifa, Saïda |
| author_facet | Gaudout, Samuel Si-Ahmed, Rayan Debavelaere, Clément Door, Menno Cladé, Pierre Guellati-Khelifa, Saïda |
| contents | We present a novel method for mapping \textit{in situ} the spatial distribution of photon momentum across a laser beam using a Bose-Einstein condensate (BEC) as a moving probe. By displacing the BEC, we measure the photon recoil by atom interferometry at different positions in the laser beam and thus reconstruct a two-dimensional map of the local intensity and effective dispersion of the $k$ wave vector. Applied to a beam diffracted by a diaphragm, this method reveals a local \textit{extra recoil} effect, which exceeds the magnitude $hν/c$ of the individual plane-waves over which the beam can be decomposed. This method offers a new way to precisely characterize wavefront distortions and to evaluate one of the major systematic bias sources in quantum sensors based on atom interferometry. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2507_19157 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Probing the spatial distribution of k-vectors in situ with Bose-Einstein condensates Gaudout, Samuel Si-Ahmed, Rayan Debavelaere, Clément Door, Menno Cladé, Pierre Guellati-Khelifa, Saïda Atomic Physics Quantum Physics We present a novel method for mapping \textit{in situ} the spatial distribution of photon momentum across a laser beam using a Bose-Einstein condensate (BEC) as a moving probe. By displacing the BEC, we measure the photon recoil by atom interferometry at different positions in the laser beam and thus reconstruct a two-dimensional map of the local intensity and effective dispersion of the $k$ wave vector. Applied to a beam diffracted by a diaphragm, this method reveals a local \textit{extra recoil} effect, which exceeds the magnitude $hν/c$ of the individual plane-waves over which the beam can be decomposed. This method offers a new way to precisely characterize wavefront distortions and to evaluate one of the major systematic bias sources in quantum sensors based on atom interferometry. |
| title | Probing the spatial distribution of k-vectors in situ with Bose-Einstein condensates |
| topic | Atomic Physics Quantum Physics |
| url | https://arxiv.org/abs/2507.19157 |