Feshbach spectroscopy of Cs atom pairs in optical tweezers
We prepare pairs of ^133 Cs atoms in a single optical tweezer and perform Feshbach spectroscopy for collisions of atoms in the states ( f = 3, m _f = ±3). We detect enhancements in pair loss using a detection scheme where the optical tweezers are repeatedly subdivided. For atoms in the state (3, −3)...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
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IOP Publishing
2022-01-01
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| Series: | New Journal of Physics |
| Subjects: | |
| Online Access: | https://doi.org/10.1088/1367-2630/ac99f6 |
| _version_ | 1827871454156292096 |
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| author | R V Brooks A Guttridge Matthew D Frye Daniel K Ruttley S Spence Jeremy M Hutson Simon L Cornish |
| author_facet | R V Brooks A Guttridge Matthew D Frye Daniel K Ruttley S Spence Jeremy M Hutson Simon L Cornish |
| author_sort | R V Brooks |
| collection | DOAJ |
| description | We prepare pairs of ^133 Cs atoms in a single optical tweezer and perform Feshbach spectroscopy for collisions of atoms in the states ( f = 3, m _f = ±3). We detect enhancements in pair loss using a detection scheme where the optical tweezers are repeatedly subdivided. For atoms in the state (3, −3), we identify resonant features by performing inelastic loss spectroscopy. We carry out coupled-channel scattering calculations and show that at typical experimental temperatures the loss features are mostly centred on zeroes in the scattering length, rather than resonance centres. We measure the number of atoms remaining after a collision, elucidating how the different loss processes are influenced by the tweezer depth. These measurements probe the energy released during an inelastic collision, and thus give information on the states of the collision products. We also identify resonances with atom pairs prepared in the absolute ground state ( f = 3, m _f = 3), where two-body radiative loss is engineered by an excitation laser blue-detuned from the Cs D _2 line. These results demonstrate optical tweezers to be a versatile tool to study two-body collisions with number-resolved detection sensitivity. |
| first_indexed | 2024-03-12T16:10:24Z |
| format | Article |
| id | doaj.art-59b037216fba4782823635a81083d279 |
| institution | Directory Open Access Journal |
| issn | 1367-2630 |
| language | English |
| last_indexed | 2024-03-12T16:10:24Z |
| publishDate | 2022-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | New Journal of Physics |
| spelling | doaj.art-59b037216fba4782823635a81083d2792023-08-09T14:09:08ZengIOP PublishingNew Journal of Physics1367-26302022-01-01241111305110.1088/1367-2630/ac99f6Feshbach spectroscopy of Cs atom pairs in optical tweezersR V Brooks0https://orcid.org/0000-0002-9262-6777A Guttridge1https://orcid.org/0000-0001-9886-5739Matthew D Frye2https://orcid.org/0000-0003-4807-2807Daniel K Ruttley3https://orcid.org/0000-0002-7976-5430S Spence4https://orcid.org/0000-0003-1907-0132Jeremy M Hutson5https://orcid.org/0000-0002-4344-6622Simon L Cornish6https://orcid.org/0000-0003-1407-4126Department of Physics and Joint Quantum Centre (JQC) Durham-Newcastle, Durham University , South Road, Durham DH1 3LE, United KingdomDepartment of Physics and Joint Quantum Centre (JQC) Durham-Newcastle, Durham University , South Road, Durham DH1 3LE, United KingdomDepartment of Chemistry and Joint Quantum Centre (JQC) Durham-Newcastle, Durham University , South Road, Durham DH1 3LE, United KingdomDepartment of Physics and Joint Quantum Centre (JQC) Durham-Newcastle, Durham University , South Road, Durham DH1 3LE, United KingdomDepartment of Physics and Joint Quantum Centre (JQC) Durham-Newcastle, Durham University , South Road, Durham DH1 3LE, United KingdomDepartment of Chemistry and Joint Quantum Centre (JQC) Durham-Newcastle, Durham University , South Road, Durham DH1 3LE, United KingdomDepartment of Physics and Joint Quantum Centre (JQC) Durham-Newcastle, Durham University , South Road, Durham DH1 3LE, United KingdomWe prepare pairs of ^133 Cs atoms in a single optical tweezer and perform Feshbach spectroscopy for collisions of atoms in the states ( f = 3, m _f = ±3). We detect enhancements in pair loss using a detection scheme where the optical tweezers are repeatedly subdivided. For atoms in the state (3, −3), we identify resonant features by performing inelastic loss spectroscopy. We carry out coupled-channel scattering calculations and show that at typical experimental temperatures the loss features are mostly centred on zeroes in the scattering length, rather than resonance centres. We measure the number of atoms remaining after a collision, elucidating how the different loss processes are influenced by the tweezer depth. These measurements probe the energy released during an inelastic collision, and thus give information on the states of the collision products. We also identify resonances with atom pairs prepared in the absolute ground state ( f = 3, m _f = 3), where two-body radiative loss is engineered by an excitation laser blue-detuned from the Cs D _2 line. These results demonstrate optical tweezers to be a versatile tool to study two-body collisions with number-resolved detection sensitivity.https://doi.org/10.1088/1367-2630/ac99f6optical tweezerscaesiumultracold collisionsFeshbach resonances |
| spellingShingle | R V Brooks A Guttridge Matthew D Frye Daniel K Ruttley S Spence Jeremy M Hutson Simon L Cornish Feshbach spectroscopy of Cs atom pairs in optical tweezers New Journal of Physics optical tweezers caesium ultracold collisions Feshbach resonances |
| title | Feshbach spectroscopy of Cs atom pairs in optical tweezers |
| title_full | Feshbach spectroscopy of Cs atom pairs in optical tweezers |
| title_fullStr | Feshbach spectroscopy of Cs atom pairs in optical tweezers |
| title_full_unstemmed | Feshbach spectroscopy of Cs atom pairs in optical tweezers |
| title_short | Feshbach spectroscopy of Cs atom pairs in optical tweezers |
| title_sort | feshbach spectroscopy of cs atom pairs in optical tweezers |
| topic | optical tweezers caesium ultracold collisions Feshbach resonances |
| url | https://doi.org/10.1088/1367-2630/ac99f6 |
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