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arXiv · 1212.6082

The demixing of the two-component fermions in optical lattices under a spin-dependent external potential

A-Hai Chen·Gao Xianlong
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Abstract

The demixing of two-component fermions in optical lattices under a spin-dependent external potential is investigated using the density-matrix renormalization group method. The influence of on-site interactions (u) and the ratio of the spin-dependent external potentials ($γ$) on the demixing is discussed. The $γ-u$ state diagram is numerically mapped out, from which we distinguish the phase-mixed region from the phase-separated one. A minimum point appears in the phase boundary. On the right part of the point an insulating core is formed in the spin-up densities during the demixing, while on the left one only metallic phase exists.

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A-Hai Chen, Gao Xianlong. 2012-12-25. The demixing of the two-component fermions in optical lattices under a spin-dependent external potential. https://doi.org/10.1103/physreva.86.065602

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