Persistent superfluid phase in a three-dimensional quantum XY model with ring exchange
arXiv:cond-mat/0408373 · doi:10.1103/PhysRevB.71.094511
Abstract
We present quantum Monte Carlo simulation results on a quantum S=1/2 XY model with ring exchange (the J-K model) on a three-dimensional simple cubic lattice. We first characterize the ground state properties of the pure XY model, obtaining estimations for the energy, spin stiffness and spin susceptibility at T=0 in the superfluid phase. With the ring exchange, we then present simulation data on small lattices which suggests that the superfluid phase persists to very large values of the ring exchange K, without signatures of a phase transition. We comment on the consequences of this result for the search for various exotic phases in three dimensions.
4 pages, 4 figures
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Cited by in corpus (5)
- Superfluid to normal phase transition in strongly correlated bosons in two and three dimensions
- Stochastic series expansion algorithm for the S=1/2 XY model with four-site ring exchange
- A Non-Perturbative Renormalization Group approach to quantum XY spin models
- Valence bond solid phases in a cubic antiferromagnet
- Quantum Monte Carlo study of superfluid density in quasi-one-dimensional hard-core bosons: Effect of suppression of phase slippage