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Feshbach Spectroscopy of Cs Atom Pairs in Optical Tweezers [dataset] Open Access

We prepare pairs of $^{133}$Cs atoms in a single optical tweezer and perform Feshbach spectroscopy for collisions of atoms in the states $(f=3, m_f=\pm3)$. 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.

Descriptions

Resource type

Dataset

Contributors

Creator: Brooks, Ralph ¹
Data collector: Guttridge, Alex ¹
Data collector: Frye, Matthew ¹
Data collector: Ruttley, Daniel ¹
Data collector: Spence, Stefan ¹
Data collector: Hutson, Jeremy ¹
Contact person: Cornish, Simon ¹

¹ Durham University, England

Funder

Durham University
Engineering and Physical Sciences Research Council

Research methods

Other description

Keyword

Optical tweezers
Caesium
Ultracold collisions
Feshbach Resonances

Subject

Location

Language

English

Cited in

Identifier

ark:/32150/r2pr76f3410
doi:10.15128/r2pr76f3410

Rights

Creative Commons Attribution 4.0 International (CC BY)

Publisher

Durham University

Date Created

2022-11-05

File Details

Depositor

A. Guttridge

Date Uploaded

12 April 2022, 14:04:34

Date Modified

13 December 2022, 15:12:58

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Characterization

File format: zip (ZIP Format)

Mime type: application/zip

File size: 2663942

Last modified: 2022:05:29 14:55:35+01:00

Filename: data_repository.zip

Original checksum: d0d445877bec7759493b6775dbcb8361