2013/07/03 by K. A. Al-Hassanieh, Julian Rincon, Julián Rincón +4
Physics and Astronomy · #Acoustics #Computer network #Computer science #Condensed matter physics #Dynamics (music) #Hubbard model #Network packet #Nonlinear Photonic Systems #Physics #Physics of Superconductivity and Magnetism #Quantum many-body systems #Quantum mechanics #Statistical physics #Superconductivity #Wave packet #cond-mat.mes-hall #cond-mat.str-el
paper · pdf · doi:10.1103/physrevb.88.045107
published as Phys. Rev. B 88, 045107 (2013) · 6 pages, 4 figures
openalex publication_date 2013/07/03 · arxiv created 2013/09/19 · arxiv updated 2014/06/27 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
Using the time-dependent density-matrix renormalization group, we study the time evolution of electronic wave packets in the one-dimensional extended Hubbard model with on-site and nearest-neighbor repulsion, U and V, respectively. As expected, the wave packets separate into spin-only and charge-only excitations (spin-charge separation). Charge and spin velocities exhibit nonmonotonic dependence on V. For small and intermediate values of V, both velocities increase with V. However, the charge velocity exhibits a stronger dependence than that of the spin, leading to a more pronounced spin-charge separation. Charge fractionalization, on the other hand, is weakly affected by V. The results are explained in terms of Luttinger liquid theory in the weak-coupling limit and an effective model in the strong-coupling regime.