Renormalization techniques for quantum spin systems. Ground-state energies

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Caspers, W.J. (1980) Renormalization techniques for quantum spin systems. Ground-state energies. Physics Reports, 63 (4). pp. 223-263. ISSN 0370-1573

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Abstract:Projection of the Hamiltonian of an antiferromagnetic lattice of spins , without external fields, onto a subspace of the total spinor space gives an approximation for the lowest eigenvalue of this Hamiltonian. Repeated projection results in a series expansion for this approximation. In each projection the form of the Hamiltonian is conserved. The formal structure of this projection technique shows a strong analogy with the Wilson theory or renormalization-group theory of phase transitions. Numerical results are given for linear chains and triangular lattice.
Item Type:Article
Copyright:© 1980 Elsevier Science
Link to this item:http://purl.utwente.nl/publications/68508
Official URL:http://dx.doi.org/10.1016/0370-1573(80)90126-X
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