77 citations · 123 across the 9 of their papers we have counts for
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quant-ph2007★ 77 cited
Combinatorics and Boson normal ordering: A gentle introduction
P. Blasiak, A. Horzela, K. A. Penson +2
We discuss a general combinatorial framework for operator ordering problems by applying it to the normal ordering of the powers and exponential of the boson number operator. The so…
math-ph2007
A Three Parameter Hopf Deformation of the Algebra of Feynman-like Diagrams
Gérard Henry Edmond Duchamp, Pawel Blasiak, Andrzej Horzela +2
We construct a three-parameter deformation of the Hopf algebra $\LDIAG$. This is the algebra that appears in an expansion in terms of Feynman-like diagrams of the {\em product form…