Symmetry obstruction to Fermi liquid behavior in the unitary limit

Article

关键词: RENORMALIZATION-GROUP APPROACH;   

DOI  :  10.1103/PhysRevB.99.035101

来源: SCIE

【 摘 要 】

We show that a Fermi gas, in three dimensions, at temperatures above the superconducting phase transition (T-c) but below the Fermi temperature (T-F), cannot be described by Fermi liquid theory (FLT) in the unitary limit where the scattering length diverges. The result follows by showing that there are no effective field theory descriptions that both behave like a Fermi liquid and properly nonlinearly realize the spontaneously broken boost and conformal invariance of the system. We have also derived an exact result for the beta function for the coupling function in the unitary limit.

【 授权许可】

Free