Observation of magnetically tunable Feshbach resonances in ultracold ²³Na⁴⁰K + ⁴⁰K collisions

Huan Yang^#^{1

2}, De-Chao Zhang^#^{1

2}, Lan Liu^#^{1

2}, Ya-Xiong Liu^{1

2}, Jue Nan^{1

2}, Bo Zhao^{3

2}, Jian-Wei Pan^{3

2}

Affiliations

¹ Hefei National Laboratory for Physical Sciences at Microscale and Department of Modern Physics, University of Science and Technology of China, Hefei, Anhui 230026, China.
² Shanghai Branch, CAS Center for Excellence and Synergetic Innovation Center in Quantum Information and Quantum Physics, University of Science and Technology of China, Shanghai 201315, China.
³ Hefei National Laboratory for Physical Sciences at Microscale and Department of Modern Physics, University of Science and Technology of China, Hefei, Anhui 230026, China. bozhao@ustc.edu.cn pan@ustc.edu.cn.

^# Contributed equally.

PMID: 30655438
DOI: 10.1126/science.aau5322

Observation of magnetically tunable Feshbach resonances in ultracold ²³Na⁴⁰K + ⁴⁰K collisions

Huan Yang et al. Science. 2019.

. 2019 Jan 18;363(6424):261-264.

doi: 10.1126/science.aau5322. Epub 2019 Jan 17.

Authors

Huan Yang^#^{1

2}, De-Chao Zhang^#^{1

2}, Lan Liu^#^{1

2}, Ya-Xiong Liu^{1

2}, Jue Nan^{1

2}, Bo Zhao^{3

2}, Jian-Wei Pan^{3

2}

Affiliations

¹ Hefei National Laboratory for Physical Sciences at Microscale and Department of Modern Physics, University of Science and Technology of China, Hefei, Anhui 230026, China.
² Shanghai Branch, CAS Center for Excellence and Synergetic Innovation Center in Quantum Information and Quantum Physics, University of Science and Technology of China, Shanghai 201315, China.
³ Hefei National Laboratory for Physical Sciences at Microscale and Department of Modern Physics, University of Science and Technology of China, Hefei, Anhui 230026, China. bozhao@ustc.edu.cn pan@ustc.edu.cn.

^# Contributed equally.

PMID: 30655438
DOI: 10.1126/science.aau5322

Abstract

Resonances in ultracold collisions involving heavy molecules are difficult to simulate theoretically and have proven challenging to detect. Here we report the observation of magnetically tunable Feshbach resonances in ultracold collisions between potassium-40 (⁴⁰K) atoms and sodium-23-potassium-40 (²³Na⁴⁰K) molecules in the rovibrational ground state. We prepare the atoms and molecules in various hyperfine levels of their ground states and observe the loss of molecules as a function of the magnetic field. The atom-molecule Feshbach resonances are identified by observing an enhancement of the loss. We have observed 11 resonances in the magnetic field range of 43 to 120 gauss. The observed atom-molecule Feshbach resonances at ultralow temperatures probe the three-body potential energy surface with exceptional resolution and will help to improve understanding of ultracold collisions.

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Observation of magnetically tunable Feshbach resonances in ultracold ²³Na⁴⁰K + ⁴⁰K collisions

Affiliations

Observation of magnetically tunable Feshbach resonances in ultracold ²³Na⁴⁰K + ⁴⁰K collisions

Authors

Affiliations

Abstract

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LinkOut - more resources

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