45 citations · 58 across the 7 of their papers we have counts for
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cond-mat.str-el2008★ 3 cited
Analysis of the N=4 Hubbard ring using a counting operator
Tobias Verhulst, Ben Anthonis, Jan Naudts
We prove three theorems about the use of a counting operator to study the spectrum of model Hamiltonians. We analytically calculate the eigenvalues of the Hubbard ring with four la…
cond-mat.str-el2008★ 3 cited
Counting operator analysis of the discrete spectrum of some model Hamiltonians
Jan Naudts, Tobias Verhulst, Ben Anthonis
The first step in the counting operator analysis of the spectrum of any model Hamiltonian H is the choice of a Hermitean operator M in such a way that the third commutator with H i…