Absorption imaging of quantum gases near surfaces using incoherent light
Fuente:
arXiv
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| Autori principali: | , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2026
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| _version_ | 1866908833818869760 |
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| author | Fekete, Julia Joshi, Poppy Krüger, Peter Oručević, Fedja |
| author_facet | Fekete, Julia Joshi, Poppy Krüger, Peter Oručević, Fedja |
| contents | We introduce an absorption imaging technique for ultracold gases that suppresses interference fringes and coherence-induced artifacts by reducing the transverse spatial coherence of the imaging light. The method preserves the narrow spectral bandwidth required for resonant absorption imaging and is implemented as a modular extension to standard imaging setups using a rotating diffuser. We demonstrate tunability of the illumination light's coherence without modifying the imaging optics. Using this approach, we achieve reliable imaging of ultracold atomic clouds in micron-scale proximity to complex surfaces, where standing waves, edge diffraction, and speckle severely limit conventional absorption imaging. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2602_13175 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Absorption imaging of quantum gases near surfaces using incoherent light Fekete, Julia Joshi, Poppy Krüger, Peter Oručević, Fedja Quantum Gases Applied Physics Optics We introduce an absorption imaging technique for ultracold gases that suppresses interference fringes and coherence-induced artifacts by reducing the transverse spatial coherence of the imaging light. The method preserves the narrow spectral bandwidth required for resonant absorption imaging and is implemented as a modular extension to standard imaging setups using a rotating diffuser. We demonstrate tunability of the illumination light's coherence without modifying the imaging optics. Using this approach, we achieve reliable imaging of ultracold atomic clouds in micron-scale proximity to complex surfaces, where standing waves, edge diffraction, and speckle severely limit conventional absorption imaging. |
| title | Absorption imaging of quantum gases near surfaces using incoherent light |
| topic | Quantum Gases Applied Physics Optics |
| url | https://arxiv.org/abs/2602.13175 |