scholarly journals High-order coupled-cluster method for general spin-lattice problems: An illustration via the anisotropic Heisenberg model

2001 ◽  
Vol 64 (17) ◽  
Author(s):  
D. J. J. Farnell ◽  
K. A. Gernoth ◽  
R. F. Bishop
Keyword(s):  
Heisenberg Model ◽  
High Order ◽  
Cluster Method ◽  
Coupled Cluster ◽  
Coupled Cluster Method ◽  
Spin Lattice ◽  
Anisotropic Heisenberg Model

scholarly journals HIGH-ORDER COUPLED CLUSTER RESULTS FOR QUANTUM ANTIFERROMAGNETS AND THEIR PHASE TRANSITIONS

2001 ◽  
Vol 15 (10n11) ◽  
pp. 1385-1388
Author(s):  
R. F. BISHOP ◽  
D. J. J. FARNELL
Keyword(s):  
Phase Transitions ◽  
Excited State ◽  
Approximation Scheme ◽  
Quantum Phase Transitions ◽  
High Order ◽  
Cluster Method ◽  
Coupled Cluster ◽  
Zero Temperature ◽  
Coupled Cluster Method ◽  
Quantum Antiferromagnets

The normal coupled cluster method is implemented to high orders in a systematic approximation scheme, and is shown to give accurate ground- and excited-state properties of anisotropic Heisenberg antiferromagnets and their quantum phase transitions at zero temperature.

scholarly journals High-order coupled cluster method calculations for the ground- and excited-state properties of the spin-halfXXZmodel

2000 ◽  
Vol 12 (30) ◽  
pp. 6887-6902 ◽  
Author(s):  
R F Bishop ◽  
D J J Farnell ◽  
S E Krüger ◽  
J B Parkinson ◽  
J Richter ◽  
...  
Keyword(s):  
Excited State ◽  
High Order ◽  
Cluster Method ◽  
Coupled Cluster ◽  
Coupled Cluster Method

The relativistic coupled-cluster method: transition energies of bismuth and eka-bismuth

1998 ◽  
Vol 94 (1) ◽  
pp. 181-187 ◽  
Author(s):  
EPHRAIM ELIAV ◽  
UZI KALDOR ◽  
YASUYUKI ISHIKAWA
Keyword(s):  
Cluster Method ◽  
Coupled Cluster ◽  
Coupled Cluster Method ◽  
Transition Energies
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