Matter at high density and low temperature is expected to be a color superconductor, which
is a degenerate Fermi gas of quarks with a condensate of Cooper pairs near the Fermi …

Recent experimental progress in trapping and cooling of molecular gases boosts interest in
the interdisciplinary field of quantum gases with dominant dipole–dipole interactions. An …

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 …

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 …

We present results of a theoretical study of H 4 e films adsorbed on graphite based on the
continuous space worm algorithm. In the first layer, we find a domain-wall phase and a …

We provide a semiquantitative tool, derived from first-principles simulations, for answering
the question of whether certain types of defects in solid He 4 support mass superflow …

The studies of defects formed by impurity particles (atoms, molecules, exciplexes, clusters,
free electrons, and positive ions) embedded in liquid and solid 4He are reviewed. The …

We have investigated the influence of impurities on the possible supersolid transition in He 4
by systematically enriching isotopically pure samples with He 3. The addition of He 3 …

We study the rotational inertia of a model of supersolid in the frame of the mean field Gross-
Pitaevskii theory in one space dimension. We discuss the ground state of the model and the …

The ground state of hard-core bosons on the square lattice with nearest and next-nearest-
neighbor repulsion is studied by quantum Monte Carlo simulations. A supersolid phase with …