Off-Diagonal Long-Range Order in Solid 4He

Abstract

Measurements of the moment of inertia by Kim and Chan have found that solid 4He acts like a supersolid at low temperatures. To understand the order in solid 4He, we have used Path Integral Monte Carlo to calculate the off-diagonal long range order (ODLRO) (equivalent to Bose-Einstein condensation, BEC). We do not find ODLRO in a perfect hcp crystal at the melting density. We discuss these results in relation to proposed quantum solid trial functions. We conclude that the solid 4He wave function has correlations which suppress both vacancies and BEC.

References in corpus (5)

• Superglass Phase of Helium-four
• On the Supersolid State of Matter
• Ring exchanges and the supersolid phase of 4He
• Bose Einstein Condensation in solid 4He
• A Wave Function Describing Superfluidity in a Perfect Crystal

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