%0 Journal Article
%T Ring exchanges and the supersolid phase of 4He
%A D. M. Ceperley
%A B. Bernu
%J Physics
%D 2004
%I arXiv
%R 10.1103/PhysRevLett.93.155303
%X Using Path Integral Monte Carlo we calculate exchange frequencies in bulk hcp 4He as atoms undergo ring exchange. We fit the frequencies to a lattice model and examine whether such atoms could become a supersolid, that is have a non-classical rotational inertia. We find that the scaling with respect to the number of exchanging atoms is such that superfluid behavior will not be observed in a perfect 4He crystal.
%U http://arxiv.org/abs/cond-mat/0409336v1