Damping of long-wavelength collective excitations in quasi-onedimensional Fermi liquids

Details Damping of long-wavelength collective excitations in quasi-onedimensional Fermi liquids Damping of long-wavelength collective excitations in quasi-onedimensional Fermi liquids

2002-09-19

arxiv.org/abs/cond-mat/0209455v1

Physica B 325, 287 (2003)

Physics

Condensed Matter

Strongly Correlated Electrons

9 pages, no figures, Physica B in press

Scientific paper

10.1016/S0921-4526(02)01541-7

The imaginary part of the exchange-correlation kernel in the longitudinal current-current response function of a quasi-onedimensional Fermi liquid is evaluated by an approximate decoupling in the equation of motion for the current density, which accounts for processes of excitation of two particle-hole pairs. The two-pair spectrum determines the intrinsic damping rate of long-wavelength collective density fluctuations, which is calculated and contrasted with a result previously obtained for a clean Luttinger liquid.

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