Metal hydrides are of inestimable importance for the future of hydrogen energy. This unique
monograph presents a clear and comprehensive description of the bulk properties of the …

We report on the observation of nonclassical rotational inertia in solid helium-4 confined to
an annular channel in a sample cell under torsional motion, demonstrating superfluid …

The dominant mechanism for creating large irreversible strain in atomic crystals is the
motion of dislocations, a class of line defects in the crystalline lattice. Here we show that the …

accepted July 30, 2008; published November 10, 2008) The possibility of a supersolid state
of matter, ie, a crystalline solid exhibiting superfluid properties, first appeared in theoretical …

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 …

No Heading Recent torsional oscillator measurements on solid 4 He confined in Vycor glass
at 62 bars show supersolid response, an abrupt drop in rotational moment of inertia, at 175 …

It is pointed out that the simulation computation of energy performed so far cannot be used to
decide if the ground state of solid He 4 has the number of lattice sites equal to the number of …

We have computed the one-body density matrix ρ 1 in solid He 4 at T= 0 K using the shadow
wave-function (SWF) variational technique. The accuracy of the SWF has been tested with …

We give a variational Monte Carlo description of He 4 filling under pressure a porous
material modeled by a smooth cylindrical nanopore. Our trial wave function is a shadow …

We have investigated disorder phenomena in solid 4 He near megting in presence of
vacancies by means of Quantum Monte Carlo (MC) simulations using the Shadow Wave …