一维强相互作用极化费米子的相图

Phase diagram of a strongly interacting polarized Fermi gas in one dimension

文章首先简要评述了目前强相互作用的极化冷费米原子体系的研究现状.在三维,人们对该体系基态存在着不同认识.为对这个问题有进一步了解,文章探讨了一维强相互作用极化费米气体.在均匀情况下,这是一个可积系统,可以得到该体系的一个严格相图.作者发现了一种非均匀的超流相在相空间占主导地位.在有外加束缚势的实验情况下,通过局域密度泛函近似,作者发现了两种新颖的相分离相.

We briefly review current research on strongly interacting uhracold atomic polarized Fermi gases. In three dimensions the ground state of such systems is under strong debate. To gain some insights we investigate a system of one-dimensional strongly interacting polarized Fermi gases. In free space this is an integrable system, and therefore an exact phase diagram can be obtained. We show that an inhomogeneous superfluid state is most widespread in the phase diagram. We consider also the trapped case with an external harmonic trap, where two novel phase separation phases are found using the local density approximation.