Anomalous Spin-Charge Separation in a Driven Hubbard System

Spin-Charge Separation in Polyacetylene

Theory of spin and charge fluctuations in the Hubbard model.

Theory of spin and charge fluctuations in the Hubbard model. Abstract A self-consistent theory of both spin and charge fluctuations in the Hubbard model is presented. It is in quantitative agreement with Monte Carlo data at least up to intermediate coupling (U ∼ 8t). It includes both short-wavelength quantum renormalization effects, and long-wavelength thermal fluctuations which can destroy lon...

Charge and Spin Transport in the One-dimensional Hubbard Model

Shi-Jian Gu, N. M. R. Peres, J. M. P. Carmelo Department of Physics and Institute of Theoretical Physics, The Chinese University of Hong Kong, Hong Kong, China Zhejiang Institute of Modern Phys, Zhejiang University, Hangzhou, 310027, China Center of Physics and Physics Department of the University of Minho, School of Sciences, Campus of Gualtar, P-4710-057 Braga, Portugal 4 GCEP-Center of Physi...

Spin drag and spin-charge separation in cold fermi gases.

Low-energy spin and charge excitations of one-dimensional interacting fermions are completely decoupled and propagate with different velocities. These modes, however, can decay due to several possible mechanisms. In this Letter we expose a new facet of spin-charge separation: not only the speeds but also the damping rates of spin and charge excitations are different. While the propagation of lo...

Charge and spin dynamics of the Hubbard chains

We calculate the local correlation functions of charge and spin for the one-chain and two-chain Hubbard model using the density matrix renormalization group method and the recursion technique. Keeping only finite number of states we get good accuracy for the low energy excitations. We study the charge and spin gaps, bandwidths and weights of the spectra for various values of the on-site Coulomb...