Bounds for the Superfluid Fraction from Exact Quantum Monte Carlo Local Densities
Other Condensed Matter
2009-11-13 v1
Abstract
For solid 4He and solid p-H2, using the flow-energy-minimizing one-body phase function and exact T=0 K Monte Carlo calculations of the local density, we have calculated the phase function, the velocity profile and upper bounds for the superfluid fraction f_s. At the melting pressure for solid 4He we find that f_s < 0.20-0.21, about ten times what is observed. This strongly indicates that the theory for the calculation of these upper bounds needs substantial improvements.
Cite
@article{arxiv.0707.4094,
title = {Bounds for the Superfluid Fraction from Exact Quantum Monte Carlo Local Densities},
author = {D. E. Galli and L. Reatto and W. M. Saslow},
journal= {arXiv preprint arXiv:0707.4094},
year = {2009}
}
Comments
to be published in Phys. Rev. B (Brief Reports)