A tentative replica theory of glassy Helium 4

Physics – Condensed Matter – Disordered Systems and Neural Networks

Scientific paper

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16 pages, 3 figures; prepared as a contribution to a special issue of JLTP on supersolids

Scientific paper

We develop a quantum replica method for interacting particle systems and use it to estimate the location of the glass transition line in Helium 4. Although we do not fully succeed in taking into account all quantum effects, we make a thorough semiclassical analysis. We confirm previous suggestions that quantum fluctuations promote the formation of the glass and give a quantitative estimate of this effect at high density. Finally, we discuss the difficulties that are met when one tries to extend the calculation to the region of low densities and low temperatures, where quantum effects are strong and the semiclassical expansion breaks down.

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