Spectral properties of a partially spin-polarized one-dimensional Hubbard/Luttinger superfluid

Abstract

We calculate the excitation spectra of a spin-polarized Hubbard chain away from half-filling, using a high-precision momentum-resolved time-dependent Density Matrix Renormalization Group method. Focusing on the U<0 case, we present in some detail the single-fermion, pair, density and spin spectra, and discuss how spin-charge separation is altered for this system. The pair spectra show a quasi-condensate at a nonzero momentum proportional to the polarization, as expected for this Fulde-Ferrel-Larkin-Ovchinnikov-like superfluid.

4 pages, 3 low resolution color figs

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Cited by in corpus (23)

• One-Dimensional Quantum Liquids: Beyond the Luttinger Liquid Paradigm
• The Fulde-Ferrell-Larkin-Ovchinnikov state for ultracold fermions in lattice and harmonic potentials: a review
• Paired states in spin-imbalanced atomic Fermi gases in one dimension
• Spin-charge separation in one-dimensional fermion systems beyond the Luttinger liquid theory
• Phase separation of trapped spin-imbalanced Fermi gases in one-dimensional optical lattices
• Quantum phase diagram of fermion mixtures with population imbalance in one-dimensional optical lattices
• Signature of the FFLO phase in the collective modes of a trapped ultracold Fermi gas
• Spectroscopy of the soliton lattice formation in quasi-one-dimensional fermionic superfluids with population imbalance
• BCS-BEC crossover and the disappearance of FFLO-correlations in a spin-imbalanced, one-dimensional Fermi gas
• Multiplons in the two-hole excitation spectra of the one-dimensional Hubbard model
• Spin-charge separated quasiparticles in one dimensional quantum fluids
• Interplay of charge, spin and lattice degrees of freedom on the spectral properties of the one-dimensional Hubbard-Holstein model
• Spectral functions of two-band spinless fermion and single-band spin-1/2 fermion models
• Collective modes of a soliton train in a Fermi superfluid
• Dimensional Crossover in a Spin-imbalanced Fermi gas
• Excitonic density-waves, bi-excitons and orbital selective pairing in two-orbital correlated chains
• Effects of interaction and polarization on spin-charge separation: A time-dependent spin-density-functional theory study
• Class of variational ansaetze for the "spin-incoherent" ground-state of a Luttinger liquid coupled to a spin bath
• Spectral function of the $U\to \infty$ one dimensional Hubbard model at finite temperature and the crossover to the spin incoherent regime
• The fate of pairing and spin-charge separation in the presence of long-range antiferromagnetism
• Approximating quantum thermodynamic properties using DFT
• Emergent Pair Density Wave Order Across a Lifshitz Transition
• Dominant superconducting correlations in a Luttinger liquid induced by spin fluctuations