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Extending the Reach of Strong-Coupling: An Iterative Technique for Hamiltonian Lattice Models

机译:扩展强耦合的范围:哈密顿格子模型的迭代技术

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The authors propose an iterative method for doing lattice strong-coupling-like calculations in a range of medium to weak couplings. The method is a modified Lanczos scheme, with greatly improved convergence properties. The technique is tested on the Mathieu equation and on a Hamiltonian finite-chain XY model, with excellent results. (Atomindex citation 15:025987)

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