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Excitonic properties of armchair graphene nanoribbons from exact diagonalization of the Hubbard model

✍ Scribed by Alfonsi, Jessica; Meneghetti, Moreno


Book ID
120074615
Publisher
Institute of Physics
Year
2012
Tongue
English
Weight
578 KB
Volume
14
Category
Article
ISSN
1367-2630

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Parallelization of the exact diagonaliza
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We present a new parallel algorithm for the exact diagonalization of the t -t'-Hubbard model with the Lanczos method. By invoking a new scheme of labeling the states we were able to obtain a speedup of up to four on 16 nodes of an IBM SP2 for the calculation of the ground state energy and an almost