Radio-frequency spectroscopy of weakly bound molecules in ultracold Fermi gas

doi:10.1088/1674-1056/23/1/013402

Abstract We create weakly bound Feshbach molecules in ultracold Fermi gas ⁴⁰K by sweeping a magnetic field across a broad Feshbach resonance point 202.2 G with a rate of 20 ms/G and perform the dissociation process using radio-frequency (RF) technology. From RF spectroscopy, we obtain the binding energy of the weakly bound molecules in the vicinity of Feshbach resonance. Our measurement also shows that the number of atoms generated from the dissociation process is different at various magnetic fields with the same RF amplitude, which gives us a deeper understanding of weakly bound Feshbach molecules.

Keywords: Feshbach resonance scattering length weakly bound molecules

Received: 30 June 2013
Revised: 06 August 2013
Accepted manuscript online:

PACS:	34.20.Cf	(Interatomic potentials and forces)
	67.85.Hj	(Bose-Einstein condensates in optical potentials)
	03.75.Lm	(Tunneling, Josephson effect, Bose-Einstein condensates in periodic potentials, solitons, vortices, and topological excitations)

Fund: Project supported by the National Basic Research Program of China (Grant No. 2011CB921601), the National Natural Science Foundation of China (Grant No. 11234008), the Project for Excellent Research Team of China (Grant No. 61121064), and the Doctoral Program Foundation of Ministry of Education, China (Grant No. 20111401130001).

Corresponding Authors: Zhang Jing
E-mail: jzhang74@aliyun.com

Cite this article:

Huang Liang-Hui (黄良辉), Wang Peng-Jun (王鹏军), Fu Zheng-Kun (付正坤), Zhang Jing (张靖) Radio-frequency spectroscopy of weakly bound molecules in ultracold Fermi gas 2014 Chin. Phys. B 23 013402

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