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arXiv · 1511.09377

Engineering quantum magnetism in one-dimensional trapped Fermi gases with p-wave interactions

Lijun Yang·Xiwen Guan·Xiaoling Cui
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Abstract

The highly controllable ultracold atoms in a one-dimensional (1D) trap provide a new platform for the ultimate simulation of quantum magnetism. In this regard, the Neel-antiferromagnetism and the itinerant ferromagnetism are of central importance and great interest. Here we show that these magnetic orders can be achieved in the strongly interacting spin-1/2 trapped Fermi gases with additional p-wave interactions. In this strong coupling limit, the 1D trapped Fermi gas exhibit an effective Heisenberg spin XXZ chain in the anisotropic p-wave scattering channels. For a particular p-wave attraction or repulsion within the same species of fermionic atoms, the system displays ferromagnetic domains with full spin segregation or the anti-ferromagnetic spin configuration in the ground state. Such engineered magnetisms are likely to be probed in a quasi-1D trapped Fermi gas of $^{40}$ K atoms with very close s-wave and p-wave Feshbach resonances.

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Lijun Yang, Xiwen Guan, Xiaoling Cui. 2016-06-01. Engineering quantum magnetism in one-dimensional trapped Fermi gases with p-wave interactions. https://doi.org/10.1103/physreva.93.051605

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