超冷温度下钾和铯原子间弹性散射特性的精确计算

张计才; 朱遵略; 孙金锋

doi:10.7498/aps.61.093401

摘要

本文分别用量子方法和半经典方法计算了超冷钾和铯原子之间弹性碰撞的s波散射长度,有效力程和p波散射长度等散射参数. 超冷温度下39K-133Cs原子间的弹性散射截面主要为s波贡献,随着碰撞能量的增加散射截面有丰富的形状共振出现, 计算发现单重态和三重态截面分别存在显著的g波和d波形状共振.另外,本文应用简并内态近似方法获得了41K-133Cs 超精细态相互作用时的s波散射长度.

关键词:

In this paper, we calculate the scattering parameters for collision between potassium and cesium atoms at ultracold temperatures, such as s-wave scattering length, effective range and p-wave scattering length, by the quantum method and semiclassical method, respectively. The singlet and the triplet elastic scattering cross sections between 39K and Cs atoms at ultracold temperatures are dominated by s-wave scattering, and shape resonance occurs with the increase of collision energy. There exist pronounced g-wave and d-wave shape resonances for the singlet and the triplet cross sections, respectively. In addition, s-wave scattering lengths are calculated by using the degenerate internet state approximation for selected hyperfine states of 41KCs.

Keywords:

作者及机构信息

1.
河南师范大学物理与信息工程学院, 新乡 453007;

2.
洛阳师范学院物理与电子信息学院, 洛阳 471022

基金项目: 国家自然科学基金(批准号: 10874064),河南省教育厅自然科学基金(批准号: 2011A140017) 和河南师范大学青年基金(批准号: 2010qk03)资助的课题.

Authors and contacts

1.
College of Physics and Information Engineering, Henan Normal University, Xinxiang 453007, China;

2.
Department of Physics, Luoyang Normal College, Luoyang 471022, China

Funds: Project supported by the National Natural Science Foundation of China (Grant No. 10874064 ), the Natural Science Foundation of Educational Bureau of Henan Province, China (Grant No. 2011A140017), and the Youth Foundation of Henan Normal University(Grant No. 2010qk03).

参考文献

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施引文献

[1]	Weiner J, Bagnato V S, Zilio S, Julienne P S 1999 Rev. Mod. Phys. 71 1
[2]	Chin C, Grimm R, Julienne P S, Tiesinga E 2010 Rev. Mod. Phys. 82 125
[3]	Burnett K, Julienne P S, Lett P D, Tiesinga E, Williams C J 2002 Nature(London) 416 225
[4]	Esry B D, Greene C H, Burke J P, Bohn J L 1997 Phys. Rev. Lett. 78 3594
[5]	Wang H, Nikolov A N, Ensher J R, Gould P L, Eyler E E, Stwalley W C, Burke J P, Bohn J L, Greene C H, Tiesinga E, Williams C J, Julienne P S 2000 Phys. Rev. A 62 052704
[6]	De Sarlo L, Maioli P, Barontini G, Catani J, Minardi F, Inguscio M 2007 Phys. Rev. A 75 022715
[7]	Falke S, Knöckel H, Friebe J, Riedmann M, Tiemann E, Lisdat C 2008 Phys. Rev. A 78 012503
[8]	Leo P J, Williams C J, Julienne P S 2000 Phys. Rev. Lett. 85 2721
[9]	Sun J F, Du B G, Zhang J C, Li W, Zhu Z L 2009 Chin. Phys. B 18 1019
[10]	Roati G, Zaccanti M, D'Errico C, Catani J, Modugno M, Simoni A, Inguscio M, Modugno G 2007 Phys. Rev. Lett. 99 010403
[11]	DeMarco B, Jin D S 1999 Science 285 1703
[12]	Modugno G, Ferrari G, Roati G, Brecha R J, Simoni A, Inguscio M 2001 Science 294 1320
[13]	Weber T, Herbig J, Mark M, Näerl H-C, Grimm R 2003 Science 299 232
[14]	Zhang J C, Jia G R, Sun J F, Liu Y F 2010 J. Low Temp.Phys. 159 484
[15]	Ferber R, Klincare I, Nikolayeva O, Tamanis M, Knöckel H, Tiemann E, Pashov A 2009 Phys. Rev. A 80 062501
[16]	Côt? R, Dalgarno A, Wang H, Stwalley W C 1998 Phys. Rev. A 57 4118
[17]	Weiss S B, Bhattacharya M, Bigelow N P 2003 Phys. Rev. A 68 042708
[18]	Dalgarno A, Rudge M R H 1965 Proc. R. Soc. London, Ser. A 286 519
[19]	Simos T E 1997 Computers Chem. 21 125
[20]	Mott N F, Massey H S W 1965 The Theory of Atomic Collisons (Oxford: Clarendon)
[21]	Gribakin G F, Flambaum V V 1993 Phys. Rev. A 48 546
[22]	Flambaum V V, Gribakin G F, Harabati C 1999 Phys. Rev. A 59 1998
[23]	Dickinson A S 2008 J. Phys. B 41 175302
[24]	Sun J F, Zhang J C, Wang J M 2006 Chin. Phys. 15 531
[25]	Jamieson M J, Zygelman B 2001 Phys. Rev. A 64 032703
[26]	Sansonetti J E, Martin W C 2005 Handbook of Basic Atomic Spectroscopic Data (NIST, 2005)
[27]	van Kempen E G M, Kokkelmans S J J M F, Heinzen D J, Verhaar B J 2002 Phys.Rev. Lett. 88 093201
[28]	Martinez de Escobar Y N, Mickelson P G, Pellegrini P, Nagel S B, Traverso A, Yan M, Côt? R, Killian T C 2008 Phys. Rev. A 78 062708
[29]	Londoño B E, Mahecha J E, Luc-Koenig E, Crubellier A 2010 Phys. Rev. A 82 012510
[30]	Tiecke T G, Goosen M R, Walraven J T M, Kokkelmans S J J M F 2010 Phys. Rev. A 82 042712

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