Radio-Frequency Spectra of Ultracold Fermi Gases Including a Generalized GMB Approximation at Unitarity
RUAN Xiao-Xia1,2, GONG Hao1,3, DU Long1, JIANG Yu4,5, SUN Wei-Min1,5,6, ZONG Hong-Shi1,5,6
1Department of Physics, Nanjing University, Nanjing 210093 2Faculty of Science, Jiangsu University, Zhenjiang 212013 3Department of Mathematics and Physics, Bengbu College, Bengbu 233030 4Center for Statistical and Theoretical Condensed Matter Physics, Zhejiang Normal University, Jinhua 321004 5State Key Laboratory of Theoretical Physics, Institute of Theoretical Physics, Chinese Academy of Sciences, Beijing 100190 6Joint Center for Particle, Nuclear Physics and Cosmology, Nanjing 210093
Abstract：Taking into account the effect of the generalized Gor'kov and Melik–Barkhudarov (GMB) approximation, we calculate the radio-frequency spectra of balanced and homogeneous ultracold Fermi gases within the framework of the non-self-consistent T-matrix approximation at unitarity in the normal phase. The corresponding equations are numerically calculated on the real frequency axis directly. It is found that our results agree well with the experimental result of the radio-frequency spectroscopy [Phys. Rev. Lett. 101 (2008) 140403].
2013, Vol. 30 
