Phase transition in the transverse Ising model using the extended coupled-cluster method
arXiv:cond-mat/9911365 · doi:10.1103/PhysRevB.62.308
Abstract
The phase transition present in the linear-chain and square-lattice cases of the transverse Ising model is examined. The extended coupled cluster method (ECCM) can describe both sides of the phase transition with a unified approach. The correlation length and the excitation energy are determined. We demonstrate the ability of the ECCM to use both the weak- and the strong-coupling starting state in a unified approach for the study of critical behavior.
10 pages, 7 eps-figures
References in corpus (4)
- The critical behaviour of the 2D Ising model in Transverse Field; a Density Matrix Renormalization calculation
- Universal amplitudes in the FSS of three-dimensional spin models
- A Coupled-Cluster Formulation of Hamiltonian Lattice Field Theory: The Non-Linear Sigma Model
- The Extended Coupled Cluster Treatment of Correlations in Quantum Magnets