The Feynman-Kleinert linearized path-integral J. A. Poulsen , J. Chem. Phys. 119, 12179 (2003) representation of quantum correlation functions is applied to compute the spectrum of density fluctuations for liquid neon at T=27.6 K, p=1.4 bar, and Q vector 1.55 Aa(-1). The calculated spectrum as well as the kinetic energy of the liquid are in excellent agreement with the experiment of Cunsolo Phys. Rev. B 67, 024507 (2003).
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