Journal
PHYSICAL REVIEW LETTERS
Volume 96, Issue 10, Pages -Publisher
AMERICAN PHYSICAL SOC
DOI: 10.1103/PhysRevLett.96.105302
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Measurements of the moment of inertia by Kim and Chan have found that solid He-4 acts like a supersolid at low temperatures. To understand the order in solid He-4, we have used path integral Monte Carlo simulations to calculate the off-diagonal long-range order (ODLRO) [equivalent to Bose-Einstein condensation (BEC)]. We do not find ODLRO in a defect-free hcp crystal of He-4 at the melting density. We discuss these results in relation to proposed quantum solid trial functions. We conclude that the solid He-4 wave function has correlations which suppress both vacancies and BEC.
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