Ring Exchanges and the Supersolid Phase of He4

D. M. Ceperley and B. Bernu
Phys. Rev. Lett. 93, 155303 – Published 7 October 2004

Abstract

Using path integral Monte Carlo simulations we calculate exchange frequencies in bulk hcp He4 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 nonclassical 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 He4 crystal.

  • Figure
  • Figure
  • Received 15 September 2004

DOI:https://doi.org/10.1103/PhysRevLett.93.155303

©2004 American Physical Society

Authors & Affiliations

D. M. Ceperley*

  • Department of Physics and NCSA, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, USA

B. Bernu

  • Laboratoire de Physique Théorique des Liquides, UMR 7600 of CNRS, Université P. et M. Curie, boite 121, 4 Place Jussieu, 75252 Paris, France

  • *Electronic address: ceperley@uiuc.edu

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Issue

Vol. 93, Iss. 15 — 8 October 2004

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