Experimental investigation of evaporative cooling mixture of bosonic 87Rb and fermionic 40K atoms with microwave and radio frequency radiation

doi:10.1088/1674-1056/20/1/016701

Abstract We investigate sympathetic cooling fermions ⁴⁰K by evaporatively cooling bosonic ⁸⁷Rb atoms in a magnetic trap with microwave and radio frequency induced evaporations in detail. The mixture of bosonic and fermionic atoms is prepared in their polarized spin states |F=9/2, m_F=9/2$\rangle$ for ⁴⁰K and |F=2, m_F=2$\rangle$ for ⁸⁷Rb, which is trapped in Quadrupole–Ioffe–Configuration trap. Comparing microwave with radio frequency evaporatively cooling bosonic ⁸⁷Rb atoms with sympathetically cooling Fermi gas ⁴⁰K, we find that the presence of rubidium atoms in the |2,1$\rangle$ Zeeman states, which are generated in the evaporative process, gives rise to a significant loss of ⁴⁰K due to inelastic collisions. Thus, the rubidium atoms populated in the |2, 1$\rangle$ Zeeman states should be removed in order to effectively perform sympathetically cooling ⁴⁰K with the evaporatively cooled ⁸⁷Rb atoms.

Keywords: microwave and radio frequency induced evaporation sympathetically cooling inelastic collisions

Received: 21 June 2010
Revised: 10 July 2010
Accepted manuscript online:

PACS:	67.85.Pq	(Mixtures of Bose and Fermi gases)
	37.10.De	(Atom cooling methods)
	64.70.fm	(Thermodynamics studies of evaporation and condensation)
	32.10.Fn	(Fine and hyperfine structure)

Fund: Project supported by the National Science Foundation for Distinguished Young Scholars of China (Grant No. 10725416), the National Basic Research Program of China (Grant No. 2006CB921101 and 2011CB921601), the National Science Foundation NSFC Project for Excellent Research Team, China (Grant No. 60821004).

Cite this article:

Wang Peng-Jun(王鹏军), Xiong De-Zhi(熊德智), Fu Zheng-Kun(付正坤), and Zhang Jing(张靖) Experimental investigation of evaporative cooling mixture of bosonic ⁸⁷Rb and fermionic ⁴⁰K atoms with microwave and radio frequency radiation 2011 Chin. Phys. B 20 016701

[1]	Truscott A G, Strecker K E, McAlexander W I, Partridge G B and Hulet R G 2001 Science 291 2570
[2]	Schreck F, Khaykovich L, Corwin K L, Ferrari G, Bourdel T, Cubizolles J and Salomon C 2001 Phys. Rev. Lett. 87 080403
[3]	G"unter K, St"oferle T, Moritz H, K"ohl M and Esslinger T 2006 Phys. Rev. Lett. 96 180402
[4]	Shin Y, Schirotzek A, Schunck C H and Ketterle W 2006 Phys. Rev. Lett. 101 070404
[5]	Ospelkaus C, Ospelkaus S, Humbert L, Ernst P, Sengstock K and Bongs K 2006 Phys. Rev. Lett. 97 120402
[6]	Modugno G, Ferrari G, Roati G, Brecha R J, Simoni A and Inguscio M 2001 Science 294 1320
[7]	Silber C, Gu"unther S, Marzok C, Deh B, Courteille Ph W and Zimmermann C 2005 Phys. Rev. Lett. 95 170408
[8]	Zirbel J J, Ni K K, Ospelkaus S, Nicholson T L, Olsen M L, Wieman C E, Ye J, Jin D S and Julienne P S 2008 Phys. Rev. A 78 013416
[9]	Haas M, Leung V, Frese D, Haubrich D, John S, Weber C, Rauschenbeute A and Meschede D 2007 New J. Phys. 9 147
[10]	Ciampini D, Courtade E, Sias C, Cossart D, Carelli G, Mango F, Morsch O and Arimondo E 2006 Opt. Commun. 257 340
[11]	Wei D, Xiong D Zh, Chen H X, Wang P J, Guo L and Zhang J 2007 Chin. Phys. Lett. 24 1541
[12]	Xiong D Zh, Chen H X, Wang P J, Yu X D, Gao F and Zhang J 2008 Chin. Phys. Lett. bf 25 843
[13]	Wei D, Xiong D Zh, Chen H X and Zhang J 2007 Chin. Phys. Lett. 24 679
[14]	Ketterle W and van Druten N J 1996 Adv. At. Mol. Opt. Phys. 37 181
[15]	Xiong D Zh, Wang P J, Fu Zh K and Zhang J 2010 Chin. Opt. Lett. 8 351
[16]	Butts D A and Rokhsar D S 1997 Phys. Rev. A 55 4346
[17]	Xiong D Zh, Wang P J, Fu Zh K and Zhang J 2010 Opt. Exppress 18 1649

[1]	Achieving ultracold Bose-Fermi mixture of ⁸⁷Rb and ⁴⁰K with dual dark magnetic-optical-trap Jie Miao(苗杰), Guoqi Bian(边国旗), Biao Shan(单标), Liangchao Chen(陈良超), Zengming Meng(孟增明), Pengjun Wang(王鹏军), Lianghui Huang(黄良辉), and Jing Zhang(张靖). Chin. Phys. B, 2022, 31(8): 080306.

No Suggested Reading articles found!

Viewed

Full text

Abstract

Cited

Metrics
Related Articles

Experimental investigation of evaporative cooling mixture of bosonic 87Rb and fermionic 40K atoms with microwave and radio frequency radiation

Cite this article:

Online attention

Experimental investigation of evaporative cooling mixture of bosonic ⁸⁷Rb and fermionic ⁴⁰K atoms with microwave and radio frequency radiation