Abstract
We present quantum Monte Carlo simulation results on a quantum model with ring exchange (the model) on a three-dimensional simple cubic lattice. We first characterize the ground-state properties of the pure model, obtaining estimations for the energy, spin stiffness, and spin susceptibility at in the superfluid phase. With the ring exchange, we then present simulation data on small lattices which suggest that the superfluid phase persists to very large values of the ring exchange , without the signatures of a phase transition. We comment on the consequences of this result for the search for various exotic phases in three dimensions.
- Received 24 August 2004
DOI:https://doi.org/10.1103/PhysRevB.71.094511
©2005 American Physical Society