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- W2084210147 abstract "A general perturbative method for finding the zero-temperature superfluid density ${mathrm{ensuremath{rho}}}_{mathit{s}}$ in $^{4}mathrm{He}$ in the presence of weak inhomogeneous external potentials is developed. The lack of translational invariance reduces ${mathrm{ensuremath{rho}}}_{mathit{s}}$ below the average mass density ensuremath{rho}ifmmodebarelsetextasciimacronfi{}, leading to an inert, or normal, part, even at temperature T=0. A variational formula for 1-${mathrm{ensuremath{rho}}}_{mathit{s}}$/ensuremath{rho}ifmmodebarelsetextasciimacronfi{} is given in terms of the density response function for uniform $^{4}mathrm{He}$. Approximations lead to a result in terms of the uniform fluid structure factor and the single-atom effective mass. Explicit numerical predictions are given for thin $^{4}mathrm{He}$ films adsorbed on ${mathrm{H}}_{2}$ and other substrates." @default.
- W2084210147 created "2016-06-24" @default.
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- W2084210147 date "1993-11-01" @default.
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- W2084210147 title "Superfluid density in inhomogeneous<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline><mml:mrow><mml:mmultiscripts><mml:mrow><mml:mi mathvariant=normal>He</mml:mi></mml:mrow><mml:mprescripts /><mml:mrow /><mml:mrow><mml:mn>4</mml:mn></mml:mrow><mml:mrow /><mml:mrow /></mml:mmultiscripts></mml:mrow></mml:math>with applications to thin films" @default.
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- W2084210147 doi "https://doi.org/10.1103/physrevb.48.13735" @default.
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