Physics – Mathematical Physics
Scientific paper
2000-06-13
Phys. A 252 (1998) 362-376
Physics
Mathematical Physics
10 pages
Scientific paper
It is proved that, in the Misra-Prigogine-Courbage Theory of Irreversibility using the Internal Time superoperator, fixing its associated non-unitary transformation $\Lambda$, amounts to rigging the corresponding Hilbert-Liouville space. More precisely, it is demonstrated that any $\Lambda $ determinates three canonical riggings of the Liouville space $\QTR{cal}{L}$: a first one with a Hilbert space with a norm greater than the relative one from $\QTR{cal}{L}$; a second one with a $\sigma $-Hilbertian space, which is a K\"{o}the space if $\Lambda$ is compact and is a nuclear space if $\Lambda$ has certain nuclear properties; and finally a third one with a smaller $\sigma $-Hilbertian space with a still stronger topology which is nuclear if $\Lambda ^{n}$ is Hilbert-Schmidt, for some positive integer n. Viceversa: any rigging of this type, originated in a dynamical system having an Internal Time superoperator, defines a $\Lambda$ in a canonical way.
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