Josephson-junction arrays are ideal model systems to study a variety of phenomena such as
phase transitions, frustration effects, vortex dynamics and chaos. In this review, we focus on …

Antiferromagnetism and superconductivity are both fundamental and common states of
matter. In many strongly correlated systems, including the high-T c cuprates, the heavy …

The Hubbard model underlies our understanding of strongly correlated materials. Whereas
its standard form only comprises interactions between particles at the same lattice site …

When holes are doped into an antiferromagnetic insulator they form a slowly fluctuating
array of “topological defects”(metallic stripes) in which the motion of the holes exhibits a self …

We determine the phase diagram of hard-core bosons on a triangular lattice with nearest-
neighbor repulsion, paying special attention to the stability of the supersolid phase. Similar …

We study quantum phase transitions in the ground state of the two dimensional hard-core
boson Hubbard Hamiltonian. Recent work on this and related models has suggested …

We study the nature of the ground state of the two-dimensional extended boson Hubbard
model on a square lattice by quantum Monte Carlo methods. We demonstrate that strong but …

We use two quantum Monte Carlo algorithms to map out the phase diagram of the two-
dimensional hardcore boson Hubbard model with near (V 1) and next near (V 2) neighbor …

This paper aims to justify the existence of a two-dimensional Bose metal, ie, a metallic phase
made out of Cooper pairs at T= 0. To this end, we consider the physics of quantum phase …

We determine the finite-temperature phase diagram of the square lattice hard-core boson
Hubbard model with nearest neighbor repulsion using quantum Monte Carlo simulations …