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Phase transition in the transverse Ising model using the extended coupled-cluster method

J. Rosenfeld·N. E. Ligterink
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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.

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J. Rosenfeld, N. E. Ligterink. 1999-11-23. Phase transition in the transverse Ising model using the extended coupled-cluster method. https://doi.org/10.1103/physrevb.62.308

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