Static response function for longitudinal and transverse excitations in superfluid helium
نویسندگان
چکیده
منابع مشابه
Static response function for longitudinal and transverse excitations in superfluid helium.
The sum rule formalism is used to evaluate rigorous bounds for the density and current static response functions in superfluid He at zero temperature. Both lower and upper bounds are considered. The bounds are expressed in terms of ground state properties (density and current correlation functions) and of the interatomic potential. The results for the density static response significantly impro...
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ژورنال
عنوان ژورنال: Physical Review B
سال: 1992
ISSN: 0163-1829,1095-3795
DOI: 10.1103/physrevb.46.13991