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- W1976943905 abstract "In lattice Hamiltonian systems with a quartic coupling $gamma$, a critical value $gamma^*$ may exist such that, when $gamma=gamma^*$, the leading irrelevant operator decouples from the Hamiltonian and the leading nonscaling contribution to renormalization-group invariant physical quantities (evaluated in the critical region) vanishes. The 1/N expansion technique is applied to the evaluation of $gamma^*$ for the lattice Hamiltonian of vector spin models with O(N) symmetry. As a byproduct, systematic asymptotic expansions for the relevant lattice massive one-loop integrals are obtained." @default.
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- W1976943905 date "2003-04-28" @default.
- W1976943905 modified "2023-09-24" @default.
- W1976943905 title "Evaluation of the improvement parameter in the lattice Hamiltonian approach to critical phenomena" @default.
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- W1976943905 doi "https://doi.org/10.1103/physreve.67.046121" @default.
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