Schmidt KP (2003)
Publication Status: Published
Publication Type: Journal article
Publication year: 2003
Publisher: IOP PUBLISHING LTD
Book Volume: 36
Pages Range: 7889-7907
Journal Issue: 29
For many-particle systems defined on lattices we investigate the global structure of effective Hamiltonians and observables obtained by means of a suitable basis transformation. We study transformations which lead to effective Hamiltonians conserving the number of excitations. The same transformation must be used to obtain effective observables. The analysis of the structure shows that effective operators give rise to a simple and intuitive perspective on the initial problem. The systematic calculation of n-particle irreducible quantities becomes possible constituting a significant progress. Details on how to implement the approach perturbatively for a large class of systems are presented.
APA:
Schmidt, K.P. (2003). The structure of operators in effective particle-conserving models. Journal of Physics A: Mathematical and General, 36(29), 7889-7907.
MLA:
Schmidt, Kai Phillip. "The structure of operators in effective particle-conserving models." Journal of Physics A: Mathematical and General 36.29 (2003): 7889-7907.
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