The influence of collision energy on magnetically tuned 6Li-6Li Feshbach resonance

doi:10.1088/1674-1056/ac4cc3

中国物理B ›› 2022, Vol. 31 ›› Issue (6): 63402-063402.doi: 10.1088/1674-1056/ac4cc3

The influence of collision energy on magnetically tuned ⁶Li-⁶Li Feshbach resonance

Rong Zhang(张蓉)¹, Yong-Chang Han(韩永昌)^1,2,†, Shu-Lin Cong(丛书林)¹, and Maksim B Shundalau^2,3

1 Department of Physics, Dalian University of Technology, Dalian 116024, China;
2 DUT-BSU Joint Institute, Dalian University of Technology, Dalian 116024, China;
3 Physics Department, Belarusian State University, Minsk, Belarus

收稿日期:2021-12-05 修回日期:2022-01-17 接受日期:2022-01-19 出版日期:2022-05-17 发布日期:2022-06-07
通讯作者: Yong-Chang Han E-mail:ychan@dlut.edu.cn
基金资助:
The project was supported by the National Key Research and Development Program of China (Grant No. 2018YFA0306503), the National Natural Science Foundation of China (Grant Nos. 21873016 and 12174044), the International Cooperation Fund Project of DBJI (Grant No. ICR2105), and the Fundamental Research Funds for the Central Universities (Grant No. DUT21LK08).

The influence of collision energy on magnetically tuned ⁶Li-⁶Li Feshbach resonance

Rong Zhang(张蓉)¹, Yong-Chang Han(韩永昌)^1,2,†, Shu-Lin Cong(丛书林)¹, and Maksim B Shundalau^2,3

1 Department of Physics, Dalian University of Technology, Dalian 116024, China;
2 DUT-BSU Joint Institute, Dalian University of Technology, Dalian 116024, China;
3 Physics Department, Belarusian State University, Minsk, Belarus

Received:2021-12-05 Revised:2022-01-17 Accepted:2022-01-19 Online:2022-05-17 Published:2022-06-07
Contact: Yong-Chang Han E-mail:ychan@dlut.edu.cn
Supported by:
The project was supported by the National Key Research and Development Program of China (Grant No. 2018YFA0306503), the National Natural Science Foundation of China (Grant Nos. 21873016 and 12174044), the International Cooperation Fund Project of DBJI (Grant No. ICR2105), and the Fundamental Research Funds for the Central Universities (Grant No. DUT21LK08).

摘要/Abstract

摘要： The effect of collision energy on the magnetically tuned $^{6}$Li-$^{6}$Li Feshbach resonance (FR) is investigated theoretically by using the coupled-channel (CC) method for the collision energy ranging from 1 μ$ {\rm K} \cdot {k}_{\rm B}$ to 100 μ$ {\rm K} \cdot {k}_{\rm B}$. At the collision energy of 1 μ$ {\rm K} \cdot {k}_{\rm B}$, the resonance positions calculated are 543.152 Gs (s wave, the unit $1 {\rm Gs}=10^{-4} {\rm T}$), 185.109 Gs (p wave $|m_{l}| = 0$), and 185.113 Gs (p wave $|m_{l}| = 1$), respectively. The p-wave FR near 185 Gs exibits a doublet structure of 4 mGs, associated with dipole-dipole interaction. With the increase of the collision energy, it is found that the splitting width remains the same (4 mGs), and that the resonance positions of s and p waves are shifted to higher magnetic fields with the increase of collision energy. The variations of the other quantities including the resonance width and the amplitude of the total scattering section are also discussed in detail. The thermally averaged elastic rate coefficients at $T=10$, 15, 20, 25 K are calculated and compared.

关键词: Feshbach resonance, collision energy, ⁶Li-⁶Li system

Abstract: The effect of collision energy on the magnetically tuned $^{6}$Li-$^{6}$Li Feshbach resonance (FR) is investigated theoretically by using the coupled-channel (CC) method for the collision energy ranging from 1 μ$ {\rm K} \cdot {k}_{\rm B}$ to 100 μ$ {\rm K} \cdot {k}_{\rm B}$. At the collision energy of 1 μ$ {\rm K} \cdot {k}_{\rm B}$, the resonance positions calculated are 543.152 Gs (s wave, the unit $1 {\rm Gs}=10^{-4} {\rm T}$), 185.109 Gs (p wave $|m_{l}| = 0$), and 185.113 Gs (p wave $|m_{l}| = 1$), respectively. The p-wave FR near 185 Gs exibits a doublet structure of 4 mGs, associated with dipole-dipole interaction. With the increase of the collision energy, it is found that the splitting width remains the same (4 mGs), and that the resonance positions of s and p waves are shifted to higher magnetic fields with the increase of collision energy. The variations of the other quantities including the resonance width and the amplitude of the total scattering section are also discussed in detail. The thermally averaged elastic rate coefficients at $T=10$, 15, 20, 25 K are calculated and compared.

Key words: Feshbach resonance, collision energy, ⁶Li-⁶Li system

中图分类号: (Scattering of atoms and molecules)

34.50.-s

34.50.Cx (Elastic; ultracold collisions) 34.80.Bm (Elastic scattering)

Rong Zhang(张蓉), Yong-Chang Han(韩永昌), Shu-Lin Cong(丛书林), and Maksim B Shundalau. The influence of collision energy on magnetically tuned ⁶Li-⁶Li Feshbach resonance[J]. 中国物理B, 2022, 31(6): 63402-063402.

Rong Zhang(张蓉), Yong-Chang Han(韩永昌), Shu-Lin Cong(丛书林), and Maksim B Shundalau. The influence of collision energy on magnetically tuned ⁶Li-⁶Li Feshbach resonance[J]. Chin. Phys. B, 2022, 31(6): 63402-063402.

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The influence of collision energy on magnetically tuned ⁶Li-⁶Li Feshbach resonance

The influence of collision energy on magnetically tuned ⁶Li-⁶Li Feshbach resonance

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