Abstract:
In connection with the physical problem of describing vacuum
superselection rules in quantum field theory, a study is made of
some properties of Op* algebras, namely, the structure of their
commutants and invariant and reducing subspaces and vector states
on such algebras. For this, a formalism is developed that uses
intertwining operators of Hermitian representations of a *
algebra. The formalism is used to obtain a number of new
properties of the commutants of Op* algebras, and a description is
given of classes of subspaces the projection operators onto which
lie in the strong or weak commutant. A study is made of the
correspondence between vector states on the Op* algebra P and on its associated yon Neumann algebra R=(Pw′)′; generalizations are found of the class of
self-adjoint Op* algebras for which a detailed investigation of
vector states can be made. Classes of weakly regular, strongly
regular, and completely regular vectors for which the properties
of states on P approach closer and closer to states on
R are identified and studied.
Citation:
A. V. Voronin, V. N. Sushko, S. S. Horuzhy, “Algebras of unbounded operators and vacuum superselection rules in quantum field theory. I. Some properties of Op*-algebras and vector states on them”, TMF, 59:1 (1984), 28–48; Theoret. and Math. Phys., 59:1 (1984), 335–350
\Bibitem{VorSusHor84}
\by A.~V.~Voronin, V.~N.~Sushko, S.~S.~Horuzhy
\paper Algebras of unbounded operators and vacuum superselection rules in quantum field theory. I. Some properties of Op*-algebras and vector states on them
\jour TMF
\yr 1984
\vol 59
\issue 1
\pages 28--48
\mathnet{http://mi.mathnet.ru/tmf4703}
\mathscinet{http://mathscinet.ams.org/mathscinet-getitem?mr=749003}
\zmath{https://zbmath.org/?q=an:0559.47033}
\transl
\jour Theoret. and Math. Phys.
\yr 1984
\vol 59
\issue 1
\pages 335--350
\crossref{https://doi.org/10.1007/BF01028511}
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