Ab Initio Calculations of the Spin-Half XY Model
D. J. J. Farnell, M. L. Ristig
Abstract
In this article, the correlated basis-function (CBF) method is applied for the first time to the quantum spin-half XY model on the linear chain, the square lattice, and the simple cubic lattice. In this treatment of the quantum spin-half XY model a Jastrow ansatz is utilised to approximate the ground-state wave function. Results for the ground-state energy and the sublattice magnetisation are presented, and evidence that the CBF detects the quantum phase transition point in this model is also presented. The CBF results are compared to previous coupled cluster method (CCM) results for the spin-half XY model, and the two formalisms are then compared and contrasted.
Create a lesson
Related papers
Spacetime Dynamics of Altermagnetic Magnons
Ali Emami Kopaei, Karthik Subramaniam Eswaran, Krzysztof Wohlfeld
Engineering Weak Universality with Quantum Dots
Warre Missiaen, Michael Wimmer, Natalia Chepiga
Lyapunov-controlled thermalization: an exact real-time example
Jonas Loy, Jan C. Louw
Multiconfigurational Analysis of Local Electronic Structure of RuO2 Using Relativistic Embedded Clusters
Zhosan I. A., Lomachuk Yu. V., Maltsev D. A. et al.
Unconstrained compact lattice QED2+1 coupled to phonons: Gauss sectors, orthogonal semimetal, and deconfined criticality
João C. Inácio, Fakher F. Assaad
Collective Charge-\(2e\) Bosonic Excitations in Charge-Ordered Systems
Ping Tang