Nonlinear dynamics of spin and charge in spin-Calogero model

Autor:	Kulkarni, M., Franchini, F., Abanov, A. G.
Rok vydání:	2009
Předmět:	Condensed Matter - Strongly Correlated Electrons High Energy Physics - Theory Mathematical Physics Nonlinear Sciences - Exactly Solvable and Integrable Systems
Zdroj:	Physical Review B 80, 165105 (2009)
Druh dokumentu:	Working Paper
DOI:	10.1103/PhysRevB.80.165105
Popis:	The fully nonlinear dynamics of spin and charge in spin-Calogero model is studied. The latter is an integrable one-dimensional model of quantum spin-1/2 particles interacting through inverse-square interaction and exchange. Classical hydrodynamic equations of motion are written for this model in the regime where gradient corrections to the exact hydrodynamic formulation of the theory may be neglected. In this approximation variables separate in terms of dressed Fermi momenta of the model. Hydrodynamic equations reduce to a set of decoupled Riemann-Hopf (or inviscid Burgers') equations for the dressed Fermi momenta. We study the dynamics of some non-equilibrium spin-charge configurations for times smaller than the time-scale of the gradient catastrophe. We find an interesting interplay between spin and charge degrees of freedom. In the limit of large coupling constant the hydrodynamics reduces to the spin hydrodynamics of the Haldane-Shastry model. Comment: 26 pages, 14 figures, 2 tables
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/0904.3762 Zobrazit plný text záznamu View this record from Arxiv