Coupled-cluster treatment of theXY-model
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چکیده
منابع مشابه
Coupled cluster treatment of an interpolating triangle-kagomé antiferromagnet
The coupled cluster method ~CCM! is applied to a spin-half model at zero temperature which interpolates between a triangular lattice antiferromagnet ~TAF! and a kagomé lattice antiferromagnet ~KAF!. The strength of the bonds which connect kagomé lattice sites is J, and the strength of the bonds which link the non-kagomé lattice sites to the kagomé lattice sites on an underlying triangular latti...
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Abstract: By the analytical coupled cluster method (CCM), we study both the ground state and lowest-lying excited-state properties of the alternating bond diamond chain. The numerical exact diagonalization (ED) method is also applied to the chain to verify the accuracy of CCM results. The ED results show that the ground-state phase diagram contains two exact spin cluster solid ground states, na...
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Computational chemistry, aiming to simulate non-trivial physical systems, imposes such high demands on the performance of software and hardware, that it comprises one of the driving forces of High Performance Computing. In particular, many-body systems, such as those simulated by the Coupled Cluster (CC) methods of the Quantum Chemistry package NWChem [4] are both computationally intensive and ...
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An efficient and highly vectorized implementation of the coupled cluster singles and doubles ~CCSD! model using a direct atomic integral technique is presented. The minimal number of n processes has been implemented for the most time consuming terms and point group symmetry is used to further reduce operation counts and memory requirements. The significantly increased application range of the C...
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ژورنال
عنوان ژورنال: Journal of Physics: Condensed Matter
سال: 1997
ISSN: 0953-8984,1361-648X
DOI: 10.1088/0953-8984/9/36/008