强非平衡Feshbach共振费米气体的射频谱
Radio frequency spectroscopy of a strongly imbalanced Feshbach-resonant Fermi gas
摘要：
已知在双组分Feshbach共振费米气体中足够大的物质不平衡（极化）驱动系统进入其正常状态。我们表明，由此产生的强相互作用的状态是一个传统的费米液体，也就是说，然而，强烈重整化的配对波动。使用受控的1/N展开，我们计算这种状态的属性，特别强调原子光谱函数，显示Migdal不连续性的动量分布函数，和射频（RF）频谱。根据Schunck等人最近对这种共振费米气体的实验（cond-mat/0702066），我们讨论了后者，并表明观察结果与传统的，但强烈重整化的费米液体图片是一致的。
英文摘要：
A sufficiently large species imbalance (polarization) in a two-component Feshbach resonant Fermi gas is known to drive the system into its normal state. We show that the resulting strongly-interacting state is a conventional Fermi liquid, that is, however, strongly renormalized by pairing fluctuations. Using a controlled 1/N expansion, we calculate the properties of this state with a particular emphasis on the atomic spectral function, the momentum distribution functions displaying the Migdal discontinuity, and the radio frequency (RF) spectrum. We discuss the latter in the light of the recent experiments of Schunck et al. (cond-mat/0702066) on such a resonant Fermi gas, and show that the observations are consistent with a conventional, but strongly renormalized Fermi-liquid picture.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
