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Model-independent bounds for the potential and kinetic energy of liquid 4He at zero temperature

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Using the experimental values of the chemical potentials of liquid 4He and of a 3He impurity in liquid 4He, we derive a model-independent lower (upper) bound to the kinetic (potential) energy per particle at zero temperature. The values of the bounds at the experimental saturation density are 13.42 K for the kinetic energy and -20.59 K for the potential energy. All the theoretical calculations based on the Lennard-Jones potential violate the upper-bound condition for the potential energy.

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Reproducció digital del document publicat en format paper, proporcionada per PROLA i http://dx.doi.org/10.1103/PhysRevB.39.2700

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Articles publicats en revistes (Física Quàntica i Astrofísica)

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Model-independent bounds for the potential and kinetic energy of liquid 4He at zero temperature