A solid is called'supersolid'if it exhibits superfluid properties. Supersolidity is a paradoxical
phenomenon whose understanding has become a major challenge since 2004, when Kim …

This review addresses experiments on elasticity, plasticity, and flow of solid He 4 and He 3,
focusing on dislocations and other defects that are responsible for the unusual mechanical …

We study different solid phases of He 4, by means of path integral Monte Carlo simulations
based on a recently developed worm algorithm. Our study includes simulations that start off …

Solid He 4 has been created off the melting curve by growth at a nearly constant mass via
the “blocked capillary” technique and growth from the He 4 superfluid at constant …

For nearly half a century the supersolid phase of matter has remained mysterious, not only
eluding experimental observation, but also generating a great deal of controversy among …

When two communicating vessels are filled to a different height with liquid, the two levels
equilibrate because the liquid can flow. We have looked for such equilibration with solid …

The supersolid state of matter, exhibiting nondissipative flow in solids, has been elusive for
35 years. The recent discovery of a nonclassical moment of inertia in solid He 4 by Kim and …

The recent torsional oscillator results of Kim and Chan show an anomalous mass
decoupling, interpreted by the authors as a supersolid phase transition, in solid He 4. We …

Here we provide an overview of the status of the field of solid 4 He with a focus on the recent
theoretical and experimental activities stimulated by the 2004 experiments of Kim and Chan …

A decrease in the rotational period observed in torsional oscillator measurements was
recently taken as a possible indication of a putative supersolid state of helium. We …