Spatially Resolved Temperature Measurement Using Rydberg Doppler Broadening Thermometry
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arXiv
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| Autori principali: | , , , , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2026
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| _version_ | 1866909013029945344 |
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| author | Trivedi, K. N. Carminati, M. Cardona, Èlia Solé Bonaccorsi, T. Donofrio, R. Bégoc, B. Morsch, O. |
| author_facet | Trivedi, K. N. Carminati, M. Cardona, Èlia Solé Bonaccorsi, T. Donofrio, R. Bégoc, B. Morsch, O. |
| contents | We demonstrate a technique for spatially resolved temperature measurement utilizing Rydberg Doppler broadening thermometry. This method employs two focused laser beams arranged perpendicularly to excite laser-cooled atoms from the ground state to a Rydberg state via two photon absorption process. Temperature is obtained through the Doppler broadening of the spectral line. The perpendicular configuration allows for selective probing of a specific position within the atomic cloud, enabling localized temperature measurement. This technique, in principle, offers a temperature resolution on the order of \SI{}{\nano\kelvin}, attributed to the exceptionally narrow natural linewidth of the involved rubidium Rydberg transition line. Furthermore, the setup enables the measurement of position-velocity correlations within the cold atom ensemble. The velocity information is extracted through the Doppler shift, whereas the spatial information is inferred from the arrival time of ions detected by a channel electron multiplier detector. We use our method to measure the local temperature in a magneto-optical trap. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2604_28002 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Spatially Resolved Temperature Measurement Using Rydberg Doppler Broadening Thermometry Trivedi, K. N. Carminati, M. Cardona, Èlia Solé Bonaccorsi, T. Donofrio, R. Bégoc, B. Morsch, O. Atomic Physics We demonstrate a technique for spatially resolved temperature measurement utilizing Rydberg Doppler broadening thermometry. This method employs two focused laser beams arranged perpendicularly to excite laser-cooled atoms from the ground state to a Rydberg state via two photon absorption process. Temperature is obtained through the Doppler broadening of the spectral line. The perpendicular configuration allows for selective probing of a specific position within the atomic cloud, enabling localized temperature measurement. This technique, in principle, offers a temperature resolution on the order of \SI{}{\nano\kelvin}, attributed to the exceptionally narrow natural linewidth of the involved rubidium Rydberg transition line. Furthermore, the setup enables the measurement of position-velocity correlations within the cold atom ensemble. The velocity information is extracted through the Doppler shift, whereas the spatial information is inferred from the arrival time of ions detected by a channel electron multiplier detector. We use our method to measure the local temperature in a magneto-optical trap. |
| title | Spatially Resolved Temperature Measurement Using Rydberg Doppler Broadening Thermometry |
| topic | Atomic Physics |
| url | https://arxiv.org/abs/2604.28002 |