5 citations · 7 across the 2 of their papers we have counts for
2 papers
math-ph2005★ 2 cited
Multidimensional quantum normal forms, Moyal star product, and torus quantization
Matthew Cargo, Alfonso Gracia-Saz, R G Littlejohn
A normal form transformation is carried out on the operators of a complete set of commuting observables in a multidimensional, integrable quantum system, mapping them by unitary co…
math.QA2004★ 5 cited
The symbol of a function of an operator
Alfonso Gracia-Saz
We give an explicit formula for the symbol of a function of an operator. Given an operator {\hat A} on L^2(R^N) with symbol A, and a function f, we obtain the symbol of f(\hat A) i…