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Communications on Stochastic Analysis
Article . 2008 . Peer-reviewed
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Interacting Fock space versus full Fock module

Authors: ACCARDI L; SKEIDE, Michael;

Interacting Fock space versus full Fock module

Abstract

We present several examples where moments of creators and an- nihilators on an interacting Fock space may be realized as moments of creators and annihilators on a full Fock module. Motivated by this experience we an- swer the question, whether such a possibility exists for arbitrary interacting Fock spaces, in the armative sense. We treat the problem in full algebraic generality. As a by-product, we find a new notion of positivity for ⁄-algebras which allows to construct tensor products of Hilbert modules over ⁄-algebras. Finally, we consider a subcategory of interacting Fock spaces which are embeddable into a usual full Fock space. We see that a creator a ⁄ (f) on the interacting Fock space is represented by an operator{' ⁄ (f), where ' ⁄ (f) is a usual creator on the full Fock space and { is an operator which does not change the number of particles. In the picture of Hilbert modules the one-particle sector is replaced by a two-sided module over an algebra which contains {. Therefore, { may be absorbed into the creator, so that we are concerned with a usual creator. However, this creator does not act on a Fock space, but rather on a Fock module.

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Italy
Keywords

Settore MAT/06 - PROBABILITA' E STATISTICA MATEMATICA, 512

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
0
Average
Average
Average
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gold