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

2024/12/10 by Samuel Milner, Milner, Samuel J., Adrian Feiguin +1
Engineering · Physics and Astronomy · #FOS: Physical sciences #Photonic Crystals and Applications #Photonic and Optical Devices #Quantum Gases (cond-mat.quant-gas) #Quantum optics and atomic interactions #Strongly Correlated Electrons (cond-mat.str-el)

paper · pdf · doi:10.48550/arxiv.2412.07900

openalex publication_date 2024/12/10 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/01

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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