Abstract
An equation for the time dependent pair correlation resp. its Fourier transform, the response function, is derived within the framework ofLandau's theory of Fermi liquids. The conditions for the validity of the optical sum rule are investigated. An “elastic” sum rule relating the response function to the compressibility is formulated and its proof indicated.
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G.Hettner zum 70. Geburtstag gewidmet.
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Brenig, W. Sum rules in the theory of Fermi liquids. Z. Physik 169, 219–223 (1962). https://doi.org/10.1007/BF01378296
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DOI: https://doi.org/10.1007/BF01378296