Quantum crystals abound in the whole range of solid-state species. Below a certain
threshold temperature the physical behavior of rare gases (He 4 and Ne), molecular solids …

We study the behavior of a Bose-Einstein condensate in which atoms are weakly coupled to
a highly excited Rydberg state. Since the latter have very strong van der Waals interactions …

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 …

We consider the ground state of a bilayer system of dipolar bosons, where dipoles are
oriented by an external field in the direction perpendicular to the parallel planes. Quantum …

We study a resonant Bose-Fermi mixture at zero temperature by using the fixed-node
diffusion Monte Carlo method. We explore the system from weak to strong boson-fermion …

Using quantum Monte Carlo we have studied the superfluid density of the first layer of He 4
and H 2 adsorbed on graphene and graphite. Our main focus has been on the equilibrium …

Knowledge of the ground state of a homogeneous quantum many-body system can be used
to find the exact ground state of a dual inhomogeneous system with a confining potential …

We investigate the zero-temperature phase diagram of interacting Bose gases in the
presence of a simple cubic optical lattice, going beyond the regime where the mapping to …

We present a first-principles computational study of solid He 4 at T= 0 K and pressures up
to∼ 160 GPa. Our computational strategy consists in using van der Waals density functional …

We have studied the possible existence of a supersolid phase of a two-dimensional dipolar
crystal using quantum-Monte Carlo methods at zero temperature. Our results show that the …