120 citations · 335 across the 10 of their papers we have counts for
10 papers
High-Order Coupled Cluster Method (CCM) Formalism 3: Finite-Size CCM
D. J. J. Farnell
Recent developments of high-order CCM have been to extend existing formalism and codes to for both the ground and excited states, and independently to "generalised…
High-Order Coupled Cluster Calculations Via Parallel Processing: An Illustration For CaVO
D. J. J. Farnell, J. Schulenburg, J. Richter +1
The coupled cluster method (CCM) is a method of quantum many-body theory that may provide accurate results for the ground-state properties of lattice quantum spin systems even in t…
Coupled Cluster Method Calculations Of Quantum Magnets With Spins Of General Spin Quantum Number
D. J. J. Farnell, R. F. Bishop, K. A. Gernoth
We present a new high-order coupled cluster method (CCM) formalism for the ground states of lattice quantum spin systems for general spin quantum number, . This new ``general-$s…
Quantum Phase Transitions in Spin Systems
J. Richter, S. E. Krüger, D. J. J. Farnell +1
We discuss the influence of strong quantum fluctuations on zero-temperature phase transitions in a two-dimensional spin-half Heisenberg system. Using a high-order coupled cluster t…
Phase Transition Of The Spin-One Square-Lattice Anisotropic Heisenberg Model
D. J. J. Farnell, K. A. Gernoth, R. F. Bishop
The coupled cluster method (CCM) is applied to the spin-one anisotropic Heisenberg antiferromagnet (HAF) on the square lattice at zero temperature using a new high-order CCM ground…
Ab Initio Treatments of the Ising Model in a Transverse Field
R. F. Bishop, D. J. J. Farnell, M. L. Ristig
In this article, new results are presented for the zero-temperature ground-state properties of the spin-half transverse Ising model on various lattices using three different approx…