Sum-rule arguments are used to derive two rigorous upper bounds for the plasmon dispersion curve in a fluid of charged bosons at zero temperature. They are readily evaluated (i) at long wavelengths, to show that the leading dispersion coefficient is negative at all couplings, and (ii) at weak coupling, to obtain a simple analytic upper bound for the whole dispersion curve.
UPPER-BOUNDS ON PLASMON DISPERSION IN THE DEGENERATE BOSON PLASMA
CHIOFALO, MARIA LUISA;
1995-01-01
Abstract
Sum-rule arguments are used to derive two rigorous upper bounds for the plasmon dispersion curve in a fluid of charged bosons at zero temperature. They are readily evaluated (i) at long wavelengths, to show that the leading dispersion coefficient is negative at all couplings, and (ii) at weak coupling, to obtain a simple analytic upper bound for the whole dispersion curve.File in questo prodotto:
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