Phase Diagram of Spin-3/2 Fermions in One Dimensional Optical Lattices

Samuel J. Milner; Adrian E. Feiguin

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arXiv · 2412.07900

Phase Diagram of Spin-3/2 Fermions in One Dimensional Optical Lattices

Samuel J. Milner·Adrian E. Feiguin

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Abstract

We present a density matrix renormalization group(DMRG) study of a generalized Hubbard chain describing effective spin S=3/2 fermions in an optical lattice.We determine the full phase diagram for the SU(4) symmetric case, and in the presence of single-ion anisotropy in terms of density and polarization.We investigate the stability and competition between different orders, such as quintet Fulde-Ferrell-Larkin-Ovchinnikov(FFLO) pairing, trion and quartet formation, and spin and atomic density waves.Notably, near half-filling, single-ion anisotropy stabilizes a correlated phase that can be understood in terms of a generalized S=2 bosonic t-J chain.

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BibTeX RIS

Samuel J. Milner, Adrian E. Feiguin. 2024-12-10. Phase Diagram of Spin-3/2 Fermions in One Dimensional Optical Lattices. https://arxiv.org/abs/2412.07900

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