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Transport properties of normal liquid helium: Comparison of various methodologies
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Image of FIG. 1.
FIG. 1.

Plots of the static structure factor (upper panel), Kubo transform of the intermediate scattering function (left panels), and the dynamic structure factor (right panels) for normal liquid helium at and . The solid lines are the results obtained from the NAC method and the open circles are the experimental results at from Ref. 83.

Image of FIG. 2.
FIG. 2.

A plot of the frequency-dependent diffusion constant for normal liquid helium at and . The solid, dashed, dotted, and dot-dashed lines are the results from quantum mode-coupling theory (QMCT), numerical analytic continuation (NAC) method, Nakayama and Makri semiclassical (SC) approach (Ref. 32, ), and the centroid molecular-dynamics (CMD) simulation approach (Ref. 89), respectively.

Image of FIG. 3.
FIG. 3.

A plot of the real part of the normalized velocity autocorrelation function for normal liquid helium and . The solid, dashed, and dotted lines are the results from QMCT, NAC method, and the Nakayama and Makri SC approach (Ref. 32, ), respectively.


Generic image for table
Table I.

Even time moments to fourth order of the velocity autocorrelation in atomic units. The PIMC result is the numerically exact result.


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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Transport properties of normal liquid helium: Comparison of various methodologies