We show that several iterative techniques, which were proposed for calculating ground-state properties of quantum models, can all be derived as the zero-temperature limit of a real-space quantum renormalization method. As a consequence, all these techniques are systematically improvable by a perturbative approach, and may be extended in a natural way to nonzero temperatures.

A Unified View On Various Iterative Approaches To the Ground-state and Finite Temperature Properties of Quantum Spin Systems

STELLA, ATTILIO;
1981

Abstract

We show that several iterative techniques, which were proposed for calculating ground-state properties of quantum models, can all be derived as the zero-temperature limit of a real-space quantum renormalization method. As a consequence, all these techniques are systematically improvable by a perturbative approach, and may be extended in a natural way to nonzero temperatures.
1981
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11577/2509507
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