Opuscula Math. 26, no. 1 (2006), 151-160
Opuscula Mathematica
A remark on generalized commutation relation and subnormality
Abstract. Tillmann [Tillmann H. G., Zur Eindeutigkeit der Losungen der quanten mechanischen vertauschungrelationen, Acta Sci. Math. (Szeged) 24 (1963), 258-270] proved that every operator \(A\) which fulfils the canonical commutation relation \(A^{*}A - AA^{*} = Id\) is an orthogonal sum of canonical creation operators. We extend this result for operators which fulfil generalized commutation relation \[A^{*}A - AA^{*}= E^2,\text{ where }EA = AE.\] In addition, some inequalities which are helpful in describing analytic vectors of operators \(A^{*}A\), where \(A\) fulfils the generalized commutation relation, are established.
Keywords: Hilbert space, generalized commutation relation, creation operator, analytic vectors.
Mathematics Subject Classification: 47B20, 47B37, 47B47.
- Jerzy Bartłomiej Stochel
- AGH University of Science and Technology, Faculty of Applied Mathematics, al. Mickiewicza 30, 30-059 Kraków, Poland
- Received: 2005-02-15.
