Geodesic
Hilbert Module Realization of the Square of White Noise and Finite Difference Algebras
Matematičeskie zametki, Tome 68 (2000) no. 6, pp. 803-818

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We develop an approach to the representations theory of the algebra of the square of white noise based on the construction of Hilbert modules. We find the unique Fock representation and show that the representation space is the usual symmetric Fock space. Although we started with one degree of freedom we end up with countably many degrees of freedom. Surprisingly, our representation turns out to have a close relation to Feinsilver's finite difference algebra. In fact, there exists a holomorphic image of the finite difference algebra in the algebra of square of white noise. Our representation restricted to this image is the Boukas representation on the finite difference Fock space. Thus we extend the Boukas representation to a bigger algebra, which is generated by creators, annihilators, and number operators. 
@article{MZM_2000_68_6_a0,
     author = {L. Accardi and M. Skeide},
     title = {Hilbert {Module} {Realization} of the {Square} of {White} {Noise} and {Finite} {Difference} {Algebras}},
     journal = {Matemati\v{c}eskie zametki},
     pages = {803--818},
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     volume = {68},
     number = {6},
     year = {2000},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_2000_68_6_a0/}
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L. Accardi; M. Skeide. Hilbert Module Realization of the Square of White Noise and Finite Difference Algebras. Matematičeskie zametki, Tome 68 (2000) no. 6, pp. 803-818. http://geodesic.mathdoc.fr/item/MZM_2000_68_6_a0/